Ballistics by the inch

Welcome!

As noted there to the right, this blog is intended to be a discussion forum primarily concerned with the ‘nuts & bolts’ of how we did our testing and the results we obtained, not a general gun discussion forum.  As such, you’ll find a number of posts already created pertaining to each of the different calibers, as well as some general topics – just go to the appropriate entry and pose a question or comment, then you can follow the discussion either by visiting the blog or subscribing to the RSS feed.  If a discussion thread gets too long, or takes a turn which warrants further attention on its own, we’ll create a new post and shift things over to it.

We reserve the right to moderate comments – to keep them on-topic, and to keep things ‘family friendly’ – but will take a fairly light hand insofar as possible.  Your cooperation on this is appreciated.

If you need to contact any of us directly, you can do so via this email address:

Jim Downey: jimd@ballisticsbytheinch.com

So, welcome – and jump in!

November 10, 2008 Posted by | Uncategorized | Comments Off on Welcome!

Now, *that’s* customer service.

Remember this guy?

with mag

Well, following the .45 Super tests earlier this summer, my pistol suffered a mechanical problem with what Boberg calls the ‘lift mechanism’ — the part which grabs a cartridge out of the magazine and pulls it back and up to position it for loading into the chamber. Basically, a pin which helps hold the mechanism in place broke, and the gun locked up.

I contacted Boberg, told them what happened, sent along some pics. They immediately responded, said that it was likely that since the gun was such a low serial number (just 0120) it had one of an early batch of pins which had substandard quality control. No biggie. They sent out a pick-up tag so I could ship it directly to them. About two weeks later (including shipping time), I had the gun back, with a new pin, all ready to go — without it costing me a cent.

Cool, right?

A couple days later I took it out to the range to see how it was working. And on the 19th round fired, it locked up again. Exact same way.

I contacted Boberg again. Again, they responded immediately. And they were astounded that it had happened a second time. The lead smith for the company queried me about the specifics of what happened, what ammo I was using, etc. Not because he thought that I was trying to pull a fast one, but because he was genuinely baffled how this could happen twice. Without hesitation they sent out another pick up tag, and I shipped the gun back in the same box it had arrived in a couple days previously. And I told them that they could take their time to investigate what happened — that I was in no hurry to have the gun back, and that above all I wanted a reliable gun rather than a quick turn-around. The lead smith understood and agreed completely.

So, a couple weeks later I got the gun back. Just yesterday, as a matter of fact (I asked them not to ship it until I was back from vacation). And I have yet to get out to test it myself. But this is what was in the box with the gun:

20150822_080243

I want to point to the first item on the invoice, which says:

Repair of firearm. RA#611, Serial #S450120. (Replaced broken lift mechanism. Put 250 rounds through it. Passed test firing.)

They ran 250 rounds through it. Not just one (which is typical for a test firing), or even a mag full (6 rounds). 250. That’s easily $100 of ammo. And probably a couple hours of someone’s time. Because like me, they wanted to make sure the gun was functioning reliably.

Now, *that*, my friends, is customer service.

Anything mechanical can break down. Even the best made items can have weird failures, regardless of the quality of materials or the care of a craftsman. It happens. I’m a conservator of rare books and documents, and it has happened in my work. What matters is whether the person/company behind that product will stand by their work and make it good.

Boberg has. Kudos to them.

 

Jim Downey

PS: Just for grins, here’s a pic of the interior I took before cleaning the gun this morning:

20150822_113419

 

August 22, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, Boberg Arms | , , , , , , , , , , | 4 Comments

Saying farewell to an old friend.

I’ve decided to say farewell to an old friend who has rarely left the safe in the last couple of years.

So if you know anyone who might be interested in a very early (and collectible) Rohrbaugh R9, have ’em take a look at these images and then go on over to Gunbroker (I’ll link to the auction when it is live). I’m selling the gun with all the items shown.

Left

Rohrbaugh R9

Right

Internals

Internals

Frame interior

Frame interior

Underside

Underside

Holstered

In custom pocket holster

Holstered2

Holster has a detachable back to mask the shape of the gun

Kit

Original case & paperwork, replacement springs, take-down tool set are all included.

As I noted in my review of the R9 from three years back, it’s a fantastic little firearm, and incredibly well made. But as I also noted in that review, I had stopped carrying it much even then. I realized recently that I hadn’t taken it out to shoot for a couple of years. And that just ain’t right.

So I’m going to find it a new home. One where it will be appreciated.

Spread the word. Thanks.

Jim Downey

EDITED TO ADD: Sale concluded happily, and this nice little gun has found a new home. Thanks, everyone!

August 19, 2015 Posted by | 9mm Luger (9x19), Links | , , , , , | 5 Comments

Do you want good data, or useable data?

Got a question I haven’t seen for a while. Here it is, with my answer (and a little bit of additional explanation) to follow:

Thanks for the site!  You do not post the altitude and  temperature of your results (unless I missed that).  Can you let us know what your reference points are?  Also, what effect would altitude and temperature variation have on your results?

Here’s the answer I gave:

Well, it’s been a while since anyone asked about that … thanks!

We did discuss this early on, and decided pretty quickly that while both of those would indeed have an effect (as would the changes in barometric pressure), that it would be so small as to not matter for the degree of accuracy of our testing equipment and the limited number of rounds tested. If you were trying to get really good data, everything would have to be much more rigorous and controlled … and we would never ever have gotten the data that we did. So as I remind people: consider the results to be *indicative*, not definitive. In other words, don’t try to read too much into variances of a few feet-per-second, or convince yourself that such minor differences really matter.

Hope that helps to give a little perspective.

Oh, and I can answer one of your questions: almost all the testing was done at an elevation of approximately 744′ above sea level, according to commercial GPS systems.

I think that’s pretty clear, but I want to emphasize one part of it: that if we had set out to provide really rigorous and statistically-significant data, the chances are that we would never have even gotten past the first test sequence. And that means there would be NO BBTI.

As it is, we have tested something in excess of 25,000 rounds over the last 7 years. At a personal cost of more than $50,000. And that doesn’t begin to include the amount of labor which has gone into the project. To get really solid data which was statistically significant, we probably would have needed to do at LEAST three or four times as many rounds fired. With three or four times the amount of time testing. And crunching the data. And cost out of pocket.

Which would have meant that we probably would never have gotten through a single test sequence.

So it’s a matter of perspective. Do you want some data which is reasonably solid, and gives a pretty good idea of what is going on with different cartridges over different barrel lengths? Or do you want very accurate, high rigorous data which would never have been produced?

Hmm … let me think about that … ;)

 

Jim Downey

PS: We haven’t forgotten about the .45 Super/.450 SMC tests — it’s just been a busy summer. Look for it soon.

August 11, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, .460 Rowland, Data, Discussion., General Procedures | , , , , , , , , , , , , , , | Leave a comment

Some “Super” performance out of a Cx4 Storm.

This is the fourth in a series of informal blog posts about the .45 ACP/Super/.450 SMC testing sequence we conducted over the Memorial Day weekend. You can find the previous posts herehere, and here.

Today we’re going to look at the results out of a stock Beretta Cx4 Storm in (obviously) .45 ACP. I have previously reviewed the Cx4 Storm in .45 ACP for Guns.com, and it is a great little pistol caliber carbine with a 16.6″ barrel. Here is Keith shooting the one we used for this recent testing:

Cx4

I want to re-iterate that the Cx4 was completely stock, with no modifications or additions whatsoever for these tests.

As I said with the previous posts about these tests, it’ll be a while before we have all the data crunched and the website updated, but I thought I would share some preliminary thoughts and information through a series of informal posts.

Quick note about the data below: All the ammo used, with the exception of the four * items, were part of our overall test sequence and had three shots made over the Oehler chronograph (which is a double-unit, and automatically records and then averages the two readings), representing a total of 6 data points. I’m just giving the overall averages here; the full data will be available on the website later. The four * ammunition types only include two shots/four data points through the Cx4. That’s because we only had one box of each of this ammo, and were wanting to get data which would be of the greatest use to the largest number of people.

 

Ammo                                                                               Cx4 Storm

      Buffalo Bore

.45 ACP Low Recoil Std P 185gr FMJ-FN                 997 fps / 408 ft-lbs

.45 ACP Std P 230gr FMJ-RN                                933 fps / 444 ft-lbs

.45 ACP +P 185gr JHP                                       1361 fps / 760 ft-lbs

.45 ACP +P 230gr JHP                                       1124 fps / 645 ft-lbs

.45 Super 185gr JHP                                         1555 fps / 993 ft-lbs

.45 Super 200gr JHP                                         1428 fps / 905 ft-lbs

.45 Super 230gr FMJ                                         1267 fps / 819 ft-lbs

.45 Super 230gr JHP                                         1289 fps / 848 ft-lbs

.45 Super 255gr Hard Cast                                 1248 fps / 881 ft-lbs

      Double Tap

.45 ACP +P 160gr Barnes TAC-XP                        1315 fps / 614 ft-lbs

.450 SMC 185gr JHP                                          1618 fps / 1075 ft-lbs

.450 SMC 185gr Bonded Defense JHP                  1556 fps / 994 ft-lbs

.450 SMC 230gr Bonded Defense JHP                  1298 fps / 860 ft-lbs

      Hornady

Critical Defense .45 ACP Std P 185gr FTX              1161 fps / 553 ft-lbs

Critical Duty .45 ACP +P 220gr Flexlock                 1018 fps / 506 ft-lbs

      Underwood

.45 Super 170gr CF                                           1421 fps / 762 ft-lbs

.45 Super 185gr XTP JHP                                   1578 fps / 1022 ft-lbs

.45 Super 230gr GD JHP                                     1264 fps / 815 ft-lbs

*Federal  HST .45 ACP Std P 230gr JHP                882 fps / 397 ft-lbs

*G2 Research  RIP  .45 ACP Std P 162gr JHP        979 fps / 344 ft-lbs

*LeHigh Defense .45 Super 170gr JHP               1289 fps / 627 ft-lbs

*Liberty  Civil Defense .45 ACP +P 78gr JHP        2180 fps / 822 ft-lbs

 

Something in particular I want to note: that in comparison to .45 ACP loads (whether standard pressure or +P), a number of the .45 Super/.450 SMC loads gain significantly more from the longer barrel. Compare these numbers to the previous posts of handguns, and you can see what I mean. You typically only gain about 10 – 15% in terms of velocity from the .45 ACP loads in going to a carbine — and this is very much in keeping with our previous testing of that cartridge. But you see upwards of a 30% gain in velocity out of some of the .45 Super/.450 SMC loads … and that translates to a 50% increase in muzzle energy!

A heavy, large projectile hitting with 900 – 1,000 foot-pounds of energy is nothing to sneeze at. Particularly when it comes with very little felt recoil out of this little carbine. That means you can get quick and accurate follow-up shots, which is always an advantage when hunting or using a gun for self/home defense.

As noted previously, we noticed no unusual wear on the Cx4 Storm, though a steady diet of such ammo could increase wear on the gun over time. And the Beretta didn’t have any problems whatsoever feeding, shooting, or ejecting any of the rounds. Where we had experienced some problems with the same ammo out of some of the handguns, there wasn’t a hiccup with the Cx4 Storm.

Look for more results, images, and thoughts in the days to come.

 

Jim Downey

June 16, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, Data, Discussion., General Procedures | , , , , , , , , , , , , , , , , , , , , , , , , , | 7 Comments

There’s got to be an easier way …

… to get all this brass cleaned:

20150612_123003

;)

Have a great weekend, everyone!

 

Jim Downey

June 12, 2015 Posted by | .45 ACP, .45 Super, .450 SMC | , , , , , , | Leave a comment

Ammo test results for a pair of 1911s

This is the third in a series of informal blog posts about the .45 ACP/Super/.450 SMC testing sequence we conducted over the Memorial Day weekend. You can find the previous posts here and here.

Today we’re going to see what the results are for a couple of different high-end 1911 platform guns. The first is an Ed Brown Kobra Carry (reviewed here), a Commander-sized (4.25″ barrel) single stack designed as a concealed-carry gun. We made no modifications of it for the more powerful loads. Here it is during our testing:

 

Ed Brown

The second is a Wilson Combat Hunter set up for the .460 Rowland cartridge with a 5.5″ barrel. Here’s my review of it, and here it is on the day of testing:

Wilson hunter

As I said with the other two posts about these tests, it’ll be a while before we have all the data crunched and the website updated, but I thought I would share some preliminary thoughts and information through a series of informal posts.

Quick note about the data below: All the ammo used, with the exception of the four * items, were part of our overall test sequence and had three shots made over the Oehler chronograph (which is a double-unit, and automatically records and then averages the two readings), representing a total of 6 data points. I’m just giving the overall averages here; the full data will be available on the website later. The four * ammunition types only include two shots/four data points through the Ed Brown Kobra Carry,  since it is a typical length for a self-defense gun. That’s because we only had one box of each of this ammo, and were wanting to get data which would be of the greatest use to the largest number of people.

 

Ammo                                                         Ed Brown Kobra Carry              Wilson Combat Hunter

      Buffalo Bore

.45 ACP Low Recoil Std P 185gr FMJ-FN                 798 fps / 261 ft-lbs                       791 fps / 256 ft-lbs

.45 ACP Std P 230gr FMJ-RN                                811 fps / 335 ft-lbs                       819 fps / 342 ft-lbs

.45 ACP +P 185gr JHP                                       1130 fps / 524 ft-lbs                     1139 fps / 532 ft-lbs

.45 ACP +P 230gr JHP                                        952 fps / 462 ft-lbs                       970 fps / 480 ft-lbs

.45 Super 185gr JHP                                         1257 fps / 648 ft-lbs                     1312 fps / 706 ft-lbs

.45 Super 200gr JHP                                         1175 fps / 613 ft-lbs                     1216 fps / 656 ft-lbs

.45 Super 230gr FMJ                                         1067 fps / 581 ft-lbs                     1105 fps / 623 ft-lbs

.45 Super 230gr JHP                                         1084 fps / 600 ft-lbs                     1109 fps / 627 ft-lbs

.45 Super 255gr Hard Cast                                 1061 fps / 637 ft-lbs                     1074 fps / 653 ft-lbs

      Double Tap

.45 ACP +P 160gr Barnes TAC-XP                        1121 fps / 446 ft-lbs                     1162 fps / 479 ft-lbs

.450 SMC 185gr JHP                                          1310 fps / 704 ft-lbs                     1350 fps / 748 ft-lbs

.450 SMC 185gr Bonded Defense JHP                  1254 fps / 645 ft-lbs                     1294 fps / 687 ft-lbs

.450 SMC 230gr Bonded Defense JHP                  1103 fps / 621 ft-lbs                     1108 fps / 626 ft-lbs

      Hornady

Critical Defense .45 ACP Std P 185gr FTX               969 fps / 385 ft-lbs                       976 fps / 391 ft-lbs

Critical Duty .45 ACP +P 220gr Flexlock                  932 fps / 424 ft-lbs                       936 fps / 427 ft-lbs

      Underwood

.45 Super 170gr CF                                           1249 fps / 588 ft-lbs                     1259 fps / 598 ft-lbs

.45 Super 185gr XTP JHP                                   1285 fps / 678 ft-lbs                     1339 fps / 736 ft-lbs

.45 Super 230gr GD JHP                                     1071 fps / 585 ft-lbs                    1099 fps / 616 ft-lbs

*Federal  HST .45 ACP Std P 230gr JHP                815 fps / 339 ft-lbs

*G2 Research  RIP  .45 ACP Std P 162gr JHP        961 fps / 332 ft-lbs

*LeHigh Defense .45 Super 170gr JHP               1165 fps / 512 ft-lbs

*Liberty  Civil Defense .45 ACP +P 78gr JHP         1843 fps / 588 ft-lbs

 

As with the other guns I’ve posted about, the general trends are pretty clear with the power rising as you go from standard pressure to +P to Super/.450 SMC, and topping out at about 750 foot-pounds of energy in a couple of loads. And it is interesting to note that the 185gr loads seem to be the “sweet spot” in terms of power across the board.

Of course, pure power is just one component for what makes a good ammunition choice. Bullet design & penetration is extremely important when considering a self-defense load. Shootability in your gun is also critical — because if you can’t recover quickly from shot to shot, then you may limit your ability in a stressful situation. Likewise, if the ammo doesn’t function reliably, or damages your gun, that is also a huge factor.

Most of the ammo we tested functioned very well in both 1911 platforms.  Interestingly, while we had experienced FTFs (failure-to-fire) with a number of the different Double-Tap rounds in both the Bobergs and the Glocks, we didn’t experience any such problems with either 1911.

The larger platform of the Wilson Combat Hunter handled the recoil very well, even from the hottest loads. Recoil was a little more noticeable with the Ed Brown, but only by a slight amount. As I noted with the Glock 21 converted for the .460 Rowland,  I was impressed that The Wilson Combat Hunter didn’t have any problems cycling even the lightest loads reliably.

Another note: we were unable to detect any damage or unusual wear to either gun, though it is possible a steady diet of loads of that power could cause some over the long term.

Lastly, I ran some .460 Rowland Buffalo Bore 230gr JHP cartridges through the Wilson Combat Hunter, since we had only had one type of ammo for that gun when we did the .460 Rowland tests.  That had been Cor-Bon Hunter 230gr JHP. The Cor-Bon tested at 1213 fps / 751 ft-lbs, and the Buffalo Bore tested at 1349 fps / 929 ft-lbs of energy.

Look for more results, images, and thoughts in the days to come.

 

Jim Downey

June 9, 2015 Posted by | .45 Colt, .45 Super, .450 SMC, .460 Rowland, Boberg Arms, Data, Discussion., General Procedures | , , , , , , , , , , , , , , , , , , , , , , , , , , , , | 2 Comments

“How can I use your data?”

We get a fair number of questions to the BBTI email account ( info@ballisticsbytheinch.com ), which I try to answer as quickly as my time will allow. Most are about specific points in our data, or why we did this or that in our procedures (answers to most such can be found in our FAQ). But every once in a while a question comes along which pushes me to re-think things from another vantage point. The following is one such from “drglenn”, and I thought I would share it and my answer:

Found your website interesting, but I am uncertain how I can use this data reliably for me. Perhaps you can offer some guidance. Clearly, barrel length data can be used relatively to compare any single caliber/brand/bullet mass to itself. This is useful to see muzzle velocities/energy as a function of barrel length which might help the consumer in determining just how much more value they will get by purchasing a longer barreled firearm. What I found frustratingly non-useful is an inability to compare bullet mass to velocity/energy across brands – or even within a single brand – of stock ammo. This, no doubt, is a function of powder composition, cartridge air-space volume, and quantity of said powder. One might reasonably assume that, every other parameter being equal, a bullet with more mass, will have a lower muzzle velocity. One might also reasonably assume that since E=1/2mv^2, that velocity is much more significant than bullet mass in determining energy (i.e., all else being equal, if you could double the velocity, you would get 4x the energy, while doubling the mass will only yield twice the energy). Apparently, this useful bit of physics becomes completely useless as each manufacturer uses different powder formulations and quantities for their ammo. So, while I may be able to determine that, across the board, a certain mass bullet or higher, in a certain caliber, regardless of manufacturer, may be subsonic, it would be a crap-shoot in guessing which mass and which manufacturer should have the highest muzzle energy in a given barrel length.

Suggestions for best use of your data would be appreciated!

Sorry, I’m not quite sure what you’re asking. You’re correct that because of proprietary powder formulations, there’s no easy comparison between different manufacturers or even between different ‘lines’ of product from a given manufacturer. In fact, the situation is even much worse than you state, because the manufacturers are *constantly* tweaking their formulations in an effort to claim more of the market. And then there’s the whole matter of terminal ballistic performance depending on the actual bullet design and composition. Toss in the fact that firearms manufacturers are also constantly making minor alterations to their models and production methods, and yeah, it’s impossible to say with any certainty that this or that combination of gun and ammo will give a reliable result. In short, there is no “perfect” solution to the very complex problems of ballistics — one of the reasons why it has a long history of attracting some of the finest minds in physics.

But you can gain insight in what to expect within certain parameters using our data. You can see that while most semi-auto handgun ammunition performs best in a certain range of barrel lengths — usually from 3″ to 8″ –, that ‘magnum’ rounds intended primarily for revolvers will continue to gain velocity/energy over a much longer range of barrel lengths, and so is more suitable for a carbine. You can tell that most ammo formulated to be “low recoil” means that it has less overall velocity/energy, since you can’t break the laws of physics. You can see that some manufacturers may claim performance standards which aren’t supported by our tests, and some are right on the money. You can argue with your friends over a beer whether it is better to use a slow heavier bullet or a lighter one which goes much faster.

In short, our data is a tool for helping analysis and decision-making, nothing more. It’s certainly not perfect. It’s not even comprehensive within a given caliber/cartridge. And it is in some sense rendered obsolete each and every time the manufacturers tweak their production materials or methods. Which is why we always tell people to consider it indicative, not definitive. Use it if it makes sense for your needs, don’t if it doesn’t. And always – ALWAYS – know that testing your own ammo out of your specific gun is the only way to know for sure how it will perform.

Hope this helps.

Jim Downey

June 4, 2015 Posted by | Data, Discussion., General Procedures | , , , , , , , | Leave a comment

Ammo test results in two versions of the Glock 21

This is the second in a series of informal blog posts about the .45 ACP/Super/.450 SMC testing sequence we conducted over the Memorial Day weekend. You can find the previous post here.

Here’s a pic of getting set the first day of shooting:

getting set

As noted previously, it’ll be a while before we have all the data crunched and the website updated, but I thought I would share some preliminary thoughts and information through a series of informal posts. In this second post, we’ll see how two different versions of a Gen 4 Glock 21 performed with the ammo. The first version was with the Glock in the standard .45 ACP configuration, the second was with my .460 Rowland conversion kit in place.

The standard configuration has a 4.61″ octagonal polygonal rifling, while the conversion barrel is 5.2″ overall with conventional rifling, threaded, and with a compensator. The .460 conversion also has a heavier recoil spring.

Quick note about the data below: All the ammo used, with the exception of the four * items, were part of our overall test sequence and had three shots made over the Oehler chronograph (which is a double-unit, and automatically records and then averages the two readings), representing a total of 6 data points. I’m just giving the overall averages here; the full data will be available on the website later. The four * ammunition types only include two shots/four data points through the standard Glock 21 configuration — we only had one box of each of this ammo, and were wanting to get data from a range of guns.

Ammo                                                         Glock 21 Standard                   Glock 21 .460 Rowland

      Buffalo Bore

.45 ACP Low Recoil Std P 185gr FMJ-FN                 801 fps / 263 ft-lbs                       792 fps / 257 ft-lbs

.45 ACP Std P 230gr FMJ-RN                                829 fps / 350 ft-lbs                       826 fps / 348 ft-lbs

.45 ACP +P 185gr JHP                                       1132 fps / 526 ft-lbs                     1168 fps / 560 ft-lbs

.45 ACP +P 230gr JHP                                        951 fps / 461 ft-lbs                       974 fps / 484 ft-lbs

.45 Super 185gr JHP                                         1279 fps / 671 ft-lbs                     1299 fps / 693 ft-lbs

.45 Super 200gr JHP                                         1178 fps / 616 ft-lbs                     1203 fps / 642 ft-lbs

.45 Super 230gr FMJ                                         1069 fps / 583 ft-lbs                     1085 fps / 601 ft-lbs

.45 Super 230gr JHP                                         1094 fps / 611 ft-lbs                     1116 fps / 635 ft-lbs

.45 Super 255gr Hard Cast                                 1063 fps / 639 ft-lbs                     1061 fps / 637 ft-lbs

      Double Tap

.45 ACP +P 160gr Barnes TAC-XP                        1103 fps / 432 ft-lbs                     1103 fps / 432 ft-lbs

.450 SMC 185gr JHP                                          1328 fps / 724 ft-lbs                     1351 fps / 749 ft-lbs

.450 SMC 185gr Bonded Defense JHP                  1301 fps / 695 ft-lbs                     1314 fps / 709 ft-lbs

.450 SMC 230gr Bonded Defense JHP                  1097 fps / 614 ft-lbs                     1132 fps / 654 ft-lbs

      Hornady

Critical Defense .45 ACP Std P 185gr FTX               984 fps / 397 ft-lbs                       979 fps / 393 ft-lbs

Critical Duty .45 ACP +P 220gr Flexlock                  945 fps / 436 ft-lbs                       943 fps / 434 ft-lbs

      Underwood

.45 Super 170gr CF                                           1239 fps / 579 ft-lbs                     1253 fps / 592 ft-lbs

.45 Super 185gr XTP JHP                                   1329 fps / 725 ft-lbs                     1348 fps / 746 ft-lbs

.45 Super 230gr GD JHP                                    1075 fps / 590 ft-lbs                     1081 fps / 596 ft-lbs

*Federal  HST .45 ACP Std P 230gr JHP                813 fps / 337 ft-lbs

*G2 Research  RIP  .45 ACP Std P 162gr JHP        942 fps / 319 ft-lbs

*LeHigh Defense .45 Super 170gr JHP              1146 fps / 495 ft-lbs

*Liberty  Civil Defense .45 ACP +P 78gr JHP        1768 fps / 580 ft-lbs

 

As with the Boberg XR45s, the general trends are pretty clear with the power rising as you go from standard pressure to +P to Super/.450 SMC, and topping out at about 750 foot-pounds of energy in a couple of loads. And it is interesting to note that the 185gr loads seem to be the “sweet spot” in terms of power across the board.

Of course, pure power is just one component for what makes a good ammunition choice. Bullet design & penetration is extremely important when considering a self-defense load. Shootability in your gun is also critical — because if you can’t recover quickly from shot to shot, then you may limit your ability in a stressful situation. Likewise, if the ammo doesn’t function reliably, or damages your gun, that is also a huge factor.

Most of the ammo we tested functioned very well in the Glock in either configuration. This isn’t surprising to anyone who has much familiarity with Glocks which typically will handle just about any ammo under all conditions. We did experience FTFs (failure-to-fire) with a number of the different Double-Tap rounds, just as we did in the Bobergs. Those seemed to have been due to light strikes on the primer, which could have been due to improper primer seating, ‘hard’ primers, or some other factor.

The larger platform of the Glock 21 handled the recoil very well, even from the hottest loads. I was impressed that even with the .460 Rowland conversion in place, with the additional weight of the compensator and the heavy recoil spring, the Glock didn’t have any problems cycling even the lightest loads reliably.

One other note: as discussed in my blog post about the .460 Rowland conversion, full-power .460 Rowland loads tend to cause damage to the magazines. As far as we could tell, the same isn’t true of the full-power .45 Super/.450 SMC loads. Just one magazine (a new one) was used for all these tests, and there was no detectable damage. Nor was there any other damage detected to the gun otherwise, though it is possible a steady diet of loads of that power could cause some over the long term.

Look for more results, images, and thoughts in the days to come.

 

Jim Downey

June 1, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, .460 Rowland, Data, Discussion., General Procedures | , , , , , , , , , , , , , , , , , , , , , , , , | 5 Comments

Ammo test results in the Boberg XR45-S

Well, we had a long, but successful, .45 ACP/Super/.450 SMC testing sequence over the memorial day weekend. Here’s a pic of the ammo station showing all the different rounds tested:

Super ammo

It’ll be a while before we have all the data crunched and the website updated, but I thought I would share some preliminary thoughts and information through a series of informal posts. This is the first such, looking at how the ammo performed in a pair of Boberg XR45-S pistols.

As I have noted previously, the Boberg operating mechanism is unusual/unique, with a reverse-feed action. This allows for a more compact design, and changes the felt recoil from what you would expect of most small semi-automatics, and is robust enough to handle full-power .45 Super/.450 SMC cartridges without any alterations. It can, however, present some reliability issues with some ammunition — see the note at the end.

Quick note about the data below: All the ammo used, with the exception of the four * items, were part of our overall test sequence and had three shots made over the Oehler chronograph (which is a double-unit, and automatically records and then averages the two readings), representing a total of 6 data points. I’m just giving the overall averages here; the full data will be available on the website later. The four * ammunition types only include two shots/four data points through one of the Bobergs — we only had one box of each of this ammo, and were wanting to get data from a range of guns.

Ammo                                                               Boberg XR45 A                           Boberg XR45 B

      Buffalo Bore

.45 ACP Low Recoil Std P 185gr FMJ-FN                 749 fps / 230 ft-lbs                       716 fps / 210 ft-lbs

.45 ACP Std P 230gr FMJ-RN                                745 fps / 283 ft-lbs                       766 fps / 299 ft-lbs

.45 ACP +P 185gr JHP                                       1060 fps / 461 ft-lbs                     1052 fps / 454 ft-lbs

.45 ACP +P 230gr JHP                                        902 fps / 415 ft-lbs                       906 fps / 419 ft-lbs

.45 Super 185gr JHP                                         1167 fps / 559 ft-lbs                     1173 fps / 565 ft-lbs

.45 Super 200gr JHP                                         1104 fps / 541 ft-lbs                     1106 fps / 543 ft-lbs

.45 Super 230gr FMJ                                         1008 fps / 518 ft-lbs                     1019 fps / 540 ft-lbs

.45 Super 230gr JHP                                         1034 fps / 545 ft-lbs                     1020 fps / 531 ft-lbs

.45 Super 255gr Hard Cast                                 1017 fps / 585 ft-lbs                     1010 fps / 577 ft-lbs

      Double Tap

.45 ACP +P 160gr Barnes TAC-XP                        1040 fps / 384 ft-lbs                     1047 fps / 389 ft-lbs

.450 SMC 185gr JHP                                          1249 fps / 640 ft-lbs                     1243 fps / 634 ft-lbs

.450 SMC 185gr Bonded Defense JHP                  1244 fps / 635 ft-lbs                     1194 fps / 585 ft-lbs

.450 SMC 230gr Bonded Defense JHP                  1068 fps / 582 ft-lbs                     1046 fps / 558 ft-lbs

      Hornady

Critical Defense .45 ACP Std P 185gr FTX               930 fps / 355 ft-lbs                       937 fps / 360 ft-lbs

Critical Duty .45 ACP +P 220gr Flexlock                  885 fps / 382 ft-lbs                       894 fps / 390 ft-lbs

      Underwood

.45 Super 170gr CF                                           1184 fps / 529 ft-lbs                     1167 fps / 513 ft-lbs

.45 Super 185gr XTP JHP                                   1250 fps / 641 ft-lbs                     1210 fps / 601 ft-lbs

.45 Super 230gr GD JHP                                    1038 fps / 550 ft-lbs                     1025 fps / 536 ft-lbs

*Federal  HST .45 ACP Std P 230gr JHP                779 fps / 309 ft-lbs

*G2 Research  RIP  .45 ACP Std P 162gr JHP        877 fps / 276 ft-lbs

*LeHigh Defense .45 Super 170gr JHP              1100 fps / 456 ft-lbs

*Liberty  Civil Defense .45 ACP +P 78gr JHP        1768 fps / 541 ft-lbs

So, there you can see the general trends pretty well. The standard-pressure .45 ACP loads run about 300 ft-lbs, the +P .45 ACP run up to about 400 ft-pounds, and the .45 Super / .450 SMC rounds are in the 500-600 ft-lbs range. That kind of distribution is what we saw across the board with other barrel lengths, as well (though you’ll have to wait to see the details and caveats on that).

Of course, pure power is just one component for what makes a good ammunition choice. Bullet design & penetration is extremely important when considering a self-defense load. Shootability in your gun is also critical — because if you can’t recover quickly from shot to shot, then you may limit your ability in a stressful situation. Likewise, if the ammo doesn’t function reliably, or damages your gun, that is also a huge factor.

Most of the ammo we tested functioned fairly well in the pair of Bobergs. We experienced FTFs (failure-to-fire) with a number of the different Double-Tap rounds, and not in just the Bobergs. Those seemed to have been due to light strikes on the primer, which could have been due to improper primer seating, ‘hard’ primers, or some other factor. And we ran into some problems with bullet separation with a number of the Buffalo Bore loads, which was confirmed later when I did some additional shooting with those rounds through my Boberg (one of the two used in the testing), to a rate of about one round per magazine. But that is due to the reverse-feed mechanism in the XR45-S, so wouldn’t be a factor in other guns (and indeed wasn’t).

Personally, I find the extra power quite manageable in the Boberg platform, but I am not very recoil sensitive. There also didn’t seem to be any damage caused to the guns by those loads. But I still don’t plan on feeding my gun a steady diet of such hot loads, the same way that I don’t always shoot full-house magnums out of my .357s and .44s. Personal preference.

Look for more results, images, and thoughts in the days to come.

Jim Downey

May 27, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, Boberg Arms, Data, Discussion., General Procedures | , , , , , , , , , , , , , , , , , , , , , , , | 5 Comments

That’s … unexpected.

Checking this morning’s stats (which I do pretty much every morning, over my first cup of coffee, just out of idle curiosity), I saw that there was an incoming link … from the Washington Post.

???

So I followed the link back, read the article, and didn’t see anything in it about BBTI. However, given the topic of the article (actually, it’s an editorial), I figured that I’d find the incoming link in the comments. And here it is:

enzo11

3/13/2015 3:58 PM CST [Edited]

There are actually many very short barreled pistols ( 7 inch, on down to Derringer-sized under-3 inch) available chambered for the .223 round.

But what this idiot of an author forgets is basic physics : the shorter the barrel, the lower the muzzle velocity. The lower the muzzle velocity, the less penetrating power the bullet has – by a large factor ( the energy is partially determined by the square of the velocity).

For a chart on muzzle velocity for different barrel lengths:

http://www.ballisticsbytheinch.com/223rifle.html

For what that does to the available energy:

http://www.ballisticsbytheinch.com/2011graphs+/223…

 

OK, BBTI wasn’t actually cited by the Washington Post. But it’s still amusing.

 

Jim Downey

March 15, 2015 Posted by | .223, Data, Discussion., Links | , , , , , , , , , | 1 Comment

Upcoming .45 test ammo.

With a little luck in about two months we’ll be doing the formal chop tests of .45 Super, .450 SMC, and some additional .45 ACP loads.  We’ve now got all the ammo on hand, and it’ll be a fun (but tiring) weekend. I thought I would share what actual ammo we will be testing, with the manufacturer’s velocity data:

Buffalo Bore
45acp Low Recoil Std P 185gr FMJ-FN      850fps
45acp Std P 230gr FMJ-RN                    850fps
45acp +P 185gr JHP                      1150fps
45acp +P 230gr JHP                 950fps
45 Super 185gr JHP                1300fps
45 Super 200gr JHP                1200fps
45 Super 230gr FMJ                1100fps
45 Super 230gr JHP                1100fps
45 Super 255gr Hard Cast            1075fps

Double Tap
45acp +P 160gr Barnes TAC-XP        1200fps from 5”     1075fps from 3.5”
450 SMC 185gr JHP                1310fps from 5” 1911
450 SMC 185gr Bonded Defense JHP    1310fps from 5” 1911
450 SMC 230gr Bonded Defense JHP    1135fps from 5” 1911

Hornady
Critical Defense 45acp Std P 185gr FTX    Muzzle 1000fps
Critical Duty 45acp +P 220gr Flexlock    Muzzle 941fps

Underwood
45 Super 170gr CF                1250fps
45 Super 185gr XTP JHP            1300fps
45 Super 230gr GD JHP            1100fps

In addition to the first data for both the .45 Super and .450 SMC cartridges, this will also almost double the number of .45 ACP loads we’ve tested.  We’re looking forward to it!

Jim Downey

March 7, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, Boberg Arms, Data, Discussion. | , , , , , , , , , , , , , , , , | 6 Comments

Boberg XR45-S: experiments in .45 Super loads – part II.

As I mentioned a few days ago, we had another warm spell here which allowed me to get out and test the next round of experimental loads for .45 Super.

As I said last time, before I get into all the nuts & bolts detail of the handloads (which I will do below), let me summarize what I learned for those who aren’t into the geeky stuff. Please note all of this is VERY TENTATIVE, based on this second set of experiments!

  • Going to a tighter crimp pretty much solved the problems I had encountered the first time with bullet separation in the Boberg. This time I only had one partial separation, in a 230gr bullet.
  • Likewise, going to shorter O.A.L. (Over All Length) for most of the loads eliminated most problems I had experienced with feeding.
  • These factors, combined with some different power levels, have put me on the right track to developing a ‘true’ .45 Super load (something which is actually more than just a .45 ACP +P).

To re-iterate: Coming up with a hand load is more art than science, since there are many different factors to consider: type and amount of propellent (gunpowder), weight and profile of the bullet chosen, the overall length (O.A.L.) of the final cartridge because the depth of the bullet seating changes the case capacity and hence the pressure profile, what type and degree of crimping, and the type of primer used.

Here are the numbers, in the same format as last time for easy comparison. Once again, let me note that these are experimental loads, and you choose to use the information here entirely at your own risk, without endorsement from me:

Titegroup powder          Bullet                   O.A.L.*                Glock 21 (5.0″)                Boberg XR45 (3.75″)

6.7gr                          185gr XTP            1.175″                       1050fps                                   970fps

7.3gr                           200gr RNFP          1.250″                       1000fps                                   925fps

6.3gr                           230gr RNFP          1.250″                        950fps                                    900fps

HP-38 powder                Bullet                   O.A.L.*                Glock 21 (5.0″)                Boberg XR45 (3.75″)

7.2gr                          185gr XTP              1.175″                       900fps                                    840fps

7.2gr                           200gr RNFP           1.250″                       900fps                                    830fps

6.8gr                           230gr RNFP           1.250″                       860fps                                    790fps

Longshot powder           Bullet                   O.A.L.*                Glock 21 (5.0″)                Boberg XR45 (3.75″)

10.0gr                         185gr XTP             1.200″                     1100fps                                  1025fps

9.5gr                           200gr RNFP           1.250″                     1010fps                                    910fps

9.0gr                           230gr RNFP           1.250″                     1020fps                                    960fps

 

Curiously, while generally going to a shorter O.A.L. (meaning that the bullet was seated deeper) resulted in the expected increase in velocity, there are a couple of instances where that didn’t happen. I’m not sure how to explain it — could have been an data reporting error on my part (or from the chrono) either this time or last time. Or it could have been not having a large enough sample size. Or it might have some variation in the handloads made for either batch of tests. I just don’t know.

But I’m not going to worry about it overmuch. Now that I seem to have resolved the separation and feeding issues, and seem to be getting good numbers, I am going to build off of these results. That means slight increases in propellant levels so that I surpass published performance numbers for .45 ACP +P. Because of my previous tests, BBTI formal testing, and published numbers for .460 Rowland, I have an upper bound for how the Glock will handle the loads safely and there’s still a lot of leeway before I start pushing those bounds.

One step at a time.

Oh, and I continue to be happy with how the XR45-S is performing. I am still waiting on some “Generation 2” magazine springs, which I think will eliminate the last of the problems I was having with feeding.

 

Jim Downey

January 23, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, .460 Rowland, Boberg Arms, Data, Discussion. | , , , , , , , , , , , , , , , , , , , | 4 Comments

First date with the Boberg XR9-S.

As I noted a couple of weeks ago, I picked up a ‘little brother‘ for my Boberg XR45-S. Here they are again:

Lil brother

Well, we’re having another delightful warm spell here in mid-Missouri, so yesterday afternoon I took advantage of it and went out to the range to give the little guy a try.

As I noted before, I have actually shot this particular gun a couple of times previously, and just loved it. But it had been a while, and I couldn’t remember specifically what ammo types we had used. So I packed up what variety of 9mm loads I had on hand, along with my chrono (which I needed to also do some more testing of .45 Super loads — more on that later), and to see whether anything had changed.

Because of the way they operate, the Boberg pistols have a tendency to be very particular about what ammo they like. Ammo which doesn’t have a sufficient crimp is prone to separate (the case being jerked away from the bullet). It’s an issue which is well known, and there’s a list of compatible ammo for both the XR9 and the XR45. But while those crowd-sourced lists are useful, the final word is always what specific ammo your particular gun will handle. For me, that’s particularly something I want to determine for any self-defense pistol before I will carry it.

Full details to follow, but for those who just want the short version: oh baby! The XR9 ate everything I fed it without a problem. Including my standard 9mm reloads. No mis-feeds. No bullet separation. No problems. And it was a real joy to shoot, which isn’t something I normally say about a pocket pistol handling full-power SD loads.

OK, for those want the details …

Below are informal* chrono numbers for seven different ammo types I had. These are all for the Boberg. But I also ran a few through my Steyr S9 for comparison, which usually just had an advantage of about 10 fps over the Boberg (the barrel on the Steyr is about a quarter of an inch longer). If that much.

  • Buffalo Bore 124gr JHP +P+                                             1,230 fps
  • Federal 124gr Hydra Shok JHP                                           1,025 fps
  • Reloads. (4.4gr HP-38, 124gr Rainier FMJ bullet)                        1,020 fps
  • Remington 124gr FMJ                                                       1,040 fps
  • Speer GDHP 115gr JHP                                                      1,210 fps
  • Speer GDHP 124gr JHP                                                      1,100 fps
  • Speer GDHP 124gr JHP +P ‘Short barrel’                           1,150 fps

As you can see, all pretty respectable numbers. And in keeping with both the claims of the manufacturer as well as what we had tested previously (where there’s overlap). I wouldn’t have any qualms carrying any of the Speer ammo, but my preferred SD ammo is currently the Buffalo Bore. Happily, the Boberg shot all of them without a glitch. And after getting my chrono numbers, I ran several magazines worth through the gun doing some quick shooting at cans, was getting excellent accuracy from it at about 15 yards.

I brought it home, stripped and cleaned it, and now consider it reliable enough to carry. Of course, I will continue to practice with it regularly, and keep a close on on how it performs with my reloads, and occasionally run a mag of carry ammo through it, but I don’t expect any problems. It’s a nice little gun.

 

Jim Downey

*By ‘informal’, I mean just using one chrono and without the lighting rig we now use for formal testing. And I would just run a magazine of ammo through, mentally noting the numbers in a running tally, then writing them down for that particular ammo, so they are necessarily just ‘ballpark’ figures. But since they jibe well with our previous numbers and what the mfg claims (which I only discovered when I sat down to write this), I think they’re pretty good.

 

January 20, 2015 Posted by | 9mm Luger (9x19), Boberg Arms, Data, Discussion. | , , , , , , , , , , , , , , , , , , , , , | 1 Comment

No matter which way you look …

…whether back over 2014, or forward into 2015, things are pretty good vis-a-vis BBTI.

Yeah, 2014 was pretty good. We didn’t do any formal testing, though I did some informal testing and a fair number of reviews of new guns or guns which were just new to me.  Having the chance to do those now and again is enjoyable, without having the same deadline pressures I had when I was doing regular columns and reviews for Guns.com.

The numbers also look pretty good for 2014. This blog went from about 12,000 visits in 2013 to 22,000 last year – nearly double. And the BBTI site itself jumped from 243,230 visitors in 2013 to 318,304 visitors in 2014 — an increase of about a third. Visits have also continued to climb pretty steadily from day-to-day, with typically about 1,250 or so daily by the end of the year. Given that we didn’t do any new testing, that’s pretty impressive.

And of course, we’d like to thank all who linked to us over the past year. Here’s the top ten referring sites for 2014, excluding search engines and Wikipedia:

  1. thefiringline.com
  2. defensivecarry.com
  3. guns.com
  4. thefirearmblog.com
  5. ar15.com
  6. gunsamerica.com
  7. reddit.com
  8. thetruthaboutguns.com
  9. rimfirecentral.com
  10. survivalistboards.com

How about the year to come, then?

Well, we’re planning on doing one largish series of tests, to cover .45 Super, .450 SMC, and a number of additional .45 ACP loadings. We haven’t yet set a date for this sequence, but I will post a note about it here and on our Facebook page once plans solidify.

And behind the scenes, improvements continue at the BBTI website. We recently upgraded our hosting set-up, to shift over to more modern software technology. We’ve started discussing how we can do better presentations of our graphs and spreadsheets. I would still very much like to work with someone to develop a mobile app — if you have the necessary skill set to do that, please drop me a note. And whenever someone finds a glitch in our data or how the site renders for them, we try and make the corrections. None of this is very obvious, but it is all a lot of work, and I’d like to once again thank our web guru (and my lovely wife) at Coeurbois Graphic Design for her efforts.

Lastly, thanks to all who use the site regularly, who cite us in online discussions, who help to spread the word. And especially, I would like to thank all who have donated to BBTI in the last year — your tangible contributions make a difference, and help to offset our ongoing costs.

Happy New Year!

 

Jim Downey

January 2, 2015 Posted by | .45 ACP, .45 Super, .450 SMC, Boberg Arms, Data, Discussion., Links | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | 1 Comment

Boberg XR45-S: experiments in .45 Super loads.

Over the course of the Christmas holiday weekend we had some unseasonably warm and pleasant weather, so I decided to go out to the range and test the first in a series of experimental hand loads I had developed for my new Boberg XR45-S. Since the XR45 is rated for the .45 Super cartridge, these loads were intended to start at about the power level of a .45 ACP+P load to give me a baseline, which I can then build up from there. I wanted to do this because there are actually very limited commercial choices in the .45 Super cartridge, and even less in the way of good testing or reloading data (which is one of the reasons why we’re going to be doing the BBTI chop tests on that cartridge in 2015 as I’ve previously mentioned).

Now, before I get into all the nuts & bolts detail of the handloads (which I will do below), let me summarize what I learned for those who aren’t into the geeky stuff. Please note all of this is VERY TENTATIVE, based on this first set of experiments!

  • The ballistic performance ‘sweet spot’ seems to come in a 200gr bullet loading, in terms of how much loss comes from a shorter barrel (the difference between the 3.75″ XR45 barrel and the 5.0″ Glock 21 barrel I used for comparison.
  • I consistently had problems with not having a tight enough crimp on the rounds at these higher power levels over a lower power standard .45 ACP practice loads. This makes sense because the slide would be moving faster with the higher power loads, leading to more problems with bullet separation.
  • I had problems with a 185gr jacketed hollow point bullet that I didn’t have with either the 200gr or 230gr round-nose bullets. And the problem seemed to be worse with the Hornady XTP JHP bullet than in factory loaded JHPs I have tried. This *might* be due to the increased ‘throat’ size of the XTP in comparison to other brands. Maybe.

Now, about my hand loads. These were all figured based on a variety of sources and my own experience and experiments in creating loads for the .460 Rowland in 2013, since, as noted, there is very little good information readily available for the .45 Super. And while I wanted to try to start at about .45 ACP+P power levels, I wanted to be fairly conservative in doing so, just to be safe. Coming up with a hand load is more art than science, since there are many different factors to consider: type and amount of propellent (gunpowder), weight and profile of the bullet chosen, the overall length (O.A.L.) of the final cartridge because the depth of the bullet seating changes the case capacity and hence the pressure profile, what type and degree of crimping, and the type of primer used. I decided to just use all one type of primer (a fairly standard one) as well as the same amount of light crimp, to help reduce the number of different factors. I also decided to pretty much standardize the O.A.L. though you will see some variation in the Longshot loads. Like I said, it’s more art than science, and you have to start someplace.

Super tests

OK, here’s a table showing the different loads and how they performed. These are experimental loads, and you choose to use the information here entirely at your own risk, without endorsement from me:

Titegroup powder          Bullet                   O.A.L.*                Glock 21 (5.0″)                Boberg XR45 (3.75″)

6.5gr                          185gr XTP            1.175″                         990fps                                     900fps

7.3gr                           200gr RNFP          1.275″                       1100fps                                   1070fps

6.3gr                           230gr RNFP          1.265″                       1020fps                                     970fps

HP-38 powder                Bullet                   O.A.L.*                Glock 21 (5.0″)                Boberg XR45 (3.75″)

6.8gr                          185gr XTP             1.175″                         600fps                                     560fps

8.0gr                           200gr RNFP          1.275″                         920fps                                     850fps

6.8gr                           230gr RNFP          1.265″                         840fps                                     770fps

Longshot powder           Bullet                   O.A.L.*                Glock 21 (5.0″)                Boberg XR45 (3.75″)

10.0gr                         185gr XTP             1.250″                     1020fps                                     960fps

9.0gr                           200gr RNFP           1.250″                     1070fps                                   1010fps

8.0gr                           230gr RNFP           1.275″                       980fps                                     880fps

*O.A.L. = Over All Length

OK, that’s obviously ‘warts & all’, following the same openness that we have done in the formal BBTI tests. I’ve only been back into reloading for about five years, and still have a hell of a lot to learn — as you can see from how badly underpowered the HP-38 loads turned out.

But it’s a decent start. I’m going to spend some more time thinking about the next step, see what additional research and comments suggest (feel free to offer your opinions!). The .45 Super loads available from Buffalo Bore are about 10-20% more powerful than these base loads, so I still have a ways to go in finding the right mix. Given the problems I was having with bullet separation (where the mechanical action of the Boberg causes the case to jerk away from the heavy bullet), the first step is probably to increase my crimp, and see what that does to the velocity (since a strong crimp will cause a greater pressure build-up before the bullet is released). I may also see what seating the bullets deeper does (meaning that the O.A.L. will be less, and again there will be a great pressure spike).

Wish me luck.

Jim Downey

December 27, 2014 Posted by | .45 ACP, .45 Super, .460 Rowland, Boberg Arms, Data, Discussion. | , , , , , , , , , , , , , , , , , , , , | 4 Comments

Boberg XR9-S: a new little brother for my XR45-S.

As Frank said on Facebook this afternoon:

I knew when you got the 45 you wanted the 9mm too. It was only a matter of time.

Guilty as charged. Look what followed me home today:

Lil brother

Yup, a Boberg XR9-S: a new little brother for my XR45-S. As I did in that post, I thought I’d put up some comparison pix to give a sense of just how small this gun is, even though it really doesn’t feel like it when you hold it or shoot it.

Here it is again with the XR45:

Lil brother 2

And here’s the view that shows the thickness of both:

Top

Yeah, there’s a difference. Here’s the XR9 with a Springfield EMP (also 9mm, 3″ barrel – the XR9 has a 3.35″ barrel):

W EMP

 

And with my J-frame in .38 Special:

W J-frame

For grins, here it is on top of the J-frame:

J Top

OK, but how about in comparison to the classic premium pocket 9mm, the Rohrbaugh R9? Here ya go:

W R9

The R9 *is* a fantastic little gun, and I love it. I don’t love shooting it, though. The XR9 wins in that category. It will also handle +P ammo and holds one more round (7+1) than the Rohrbaugh. But it is a bit bigger:

R9 Top

Lastly, here it is with a Bond Arms derringer — a great little gun, with a variety of different barrels available. But there’s still just two shots in the derringer, and it actually weighs about 3 ounces more.

W Bond

While I have shot this gun (it belonged to a good friend), and know it to be dependable, I do still want to make sure that it will be able to reliably digest my preferred SD loads. So more on that to come!

 

Jim Downey

December 26, 2014 Posted by | .45 ACP, .45 Super, 9mm Luger (9x19), Boberg Arms, Discussion. | , , , , , , , , , , , , , , , , , , , , , , | 1 Comment

First date with the Boberg XR45-S

Over the weekend I posted about picking up my new Boberg XR45-S. This afternoon I took it out for a first “getting to know you” session. More about that in a moment.

First, I want to share a couple of things I discovered in getting the Boberg out of the box, taken apart, and cleaned. This wasn’t strictly necessary, of course, because it came from the factory properly cleaned and lubed. But I’m very much a hands-on learner, and wanted to see what I was dealing with.

The gun is very user-friendly. To take it down for field stripping, you just rack the slide back, turn a lever, then move the slide forward. You don’t need any special tools, or an extra hand, or the strength of the pure. In that sense, it is very much in the modern design, as easy as a Glock. BUT without the need to dry-fire the gun first (which always makes me twitch, and may be the only thing I really dislike about the Glock design.)

Once the slide comes away from the frame, there are only 4 parts which come apart (other than the slide itself). There are no little fiddly bits to get lost or to spring out of sight when you’re not looking. You don’t have to disassemble the gun in a paper bag so that you don’t lose anything. It’s easy, obvious, and once you’ve done it following the owner’s manual, I doubt you’ll ever need to refer to the manual again. You can’t ask for more than that.

So, dis-assembly, cleaning, and re-assembly is all a breeze. Nice!

Having done so, I went through my box of misc. holsters to see what the Boberg might fit into. Because the XR45 is so new there are damned few holster-makers out there who have a holster listed to fit it. And I discovered something VERY interesting: the slide has almost the exact same dimensions as the Glock 21 (and similar Glock models). I first found this out in trying it in this little plastic holster: Glock Sport Combat Holster. I got out my calipers and did some measuring, and found that there was less than a millimeter difference in the width of the slide on the Glock 21 and the Boberg. They also have very similar profiles. And if you measure from the deepest pocket on the backstrap of either gun (where the web of your hand settles in) to the front of the trigger guard, there is less than 2 millimeters difference. Meaning that the Boberg fits almost perfectly into an open-muzzle holster for a Glock 21. Good to know!

OK, so what about going out shooting with the Boberg today?

Overall, I was very happy with how it performed on a first outing. I had a couple of minor glitches with improper feeding and ejection, but I am going to hold off on making any decisions about that until I give it at least another range session to break in. It does seem to fling spent cases somewhere into the next county, and I’m going to have to get used to that since I like to recover those cases and reload them. My very mild reloads wouldn’t cycle properly (the ones I took out are *really* mild), so I learned to take somewhat hotter loads. And the trigger is really  l o n g  … longer than either J-frame I own, and about like the little DAO Rohrbaugh I have. The gun seems to shoot a little to the left for me, but I won’t adjust the sights until I’m more familiar with it. Even so, I was able to consistently ding a 6″ spinner at 10 yards, which is all I expect from a pocket pistol.

How did it handle the different ammos I tried? Quite well, all in all.

I took my Glock 21 (5″ barrel) along for comparison, and shot over a single chronograph. Here are the average numbers:

                                                            Glock 21                                     Boberg

CorBon DPX 185gr +P                          1060FPS                                   1030FPS

Winchester SXZ Training 230gr              850FPS                                      795FPS

Speer GDHP 230gr                                 840FPS                                      760FPS

CorBon JHP 230gr +P                            980FPS                                      900FPS

The CorBon ammo is in line with what we tested formally. So that was good to see.

All together, I put about 100 rounds through the Boberg this afternoon, and wasn’t experiencing any real soreness or tiredness from all that shooting, which is unusual for such a small gun and full power loads. And just for comparison, I shot my .38Sp J-frame with 158gr LSWCHP +P from Buffalo Bore, which is my preferred SD loading for that gun, and the recoil was  worse than with the Boberg. That’s for a ME comparison of 386 ft/lbs for the J-frame to 436 ft/labs for the Boberg with the 185gr CorBon loading.

So, that’s that. Already, the Boberg is equal to the J-frame, in my eyes. I shoot it as well. It has the same, or greater, amount of power. Reloading is faster. And it holds 6+1 to start. I still want to put it through its paces before I trust it as a carry gun, and there will be times when I still prefer to have the revolver, but already I can see that the Boberg is going to be a very nice addition to my collection. Once I get into .45 Super power levels, that will really make a difference.

More to come.

Jim Downey

December 8, 2014 Posted by | .38 Special, .45 ACP, Boberg Arms, Discussion., General Procedures | , , , , , , , , , , , , , , , | 4 Comments

Boberg XR45

I’ve written about the innovative Boberg Arms XR9 previously. Here’s the take-away from my review:

This gun is a winner. It is well designed, and well made. The innovative design makes your brain hurt when you first see it. But the recoil is nothing like what you get from any other “pocket gun”, even when shooting full +P defensive ammunition. Usually with a pocket gun, you trade off the pain of shooting it a lot for the convenience of being able to carry it easily. With the Boberg, you don’t have to make that trade-off. I honestly wouldn’t be bothered at all by running a couple hundred rounds through this gun at the range.

Well, guess what followed me home today.

No, not an XR9. Something a little … bigger:

Case

Yup, one of the new XR45s.

Here’s a pic of one from my outing with the other BBTI guys a few weeks ago:

XR45S2

It’s a little hard to tell how big the gun is in that pic. Here it is with some others:

all 4

Starting in the upper left corner and going clockwise, those are: A Steyr S9 in 9mm, a Springfield EMP in 9mm, the Boberg XR45 in .45ACP, and a S&W J-frame in .38sp.

Here’s the Boberg back to back with the Steyr:

with S9

With the EMP:

with EMP

And with the J-frame:

with j-frame

And just for grins, here’s the Boberg with the J-frame sitting right on top of it:

on top

Yeah, the 6+1 Boberg is actually smaller than the three other compact pistols. And it has a longer barrel than all three — 3.75″ on the Boberg, compared to 3.5″ in the Steyr, 3.0″ in the EMP, and 1.875″ on the J-frame.

How does it do this? Because of the innovative … some would say just plain weird … way the feed mechanism works. For the best explanation, take a look at the animation on the Boberg homepage, but basically as the slide comes back, it grabs a new cartridge out of the magazine by the rim and then positions it into the chamber. Yeah, you put the bullets in the magazine nose first. Like this:

with mag

And here’s a detail of the top of the loaded mag:

mag loaded

It takes some getting used to, I admit.

Now, while the Boberg is actually smaller in overall size than the other guns, it still has some heft to it: 22 ounces, as opposed to both the Steyr and the EMP at 26. The J-frame shown is a Model M&P 360 with the Scandium frame, so it comes in under 14 ounces. All of those are unloaded weight.

How does it shoot? Like this:

“Not bad at all.”

That was with .45 ACP+P high-end self-defense rounds. And the Boberg is actually rated for .45 Super, a cartridge which is dimensionally the same as the .45 ACP, but which is much higher pressure, about 30% greater than even +P … which almost takes it into .460 Rowland territory in terms of the ballistics.

Since I just got mine, it will take a while to find out all the little quirks that it has. But based on shooting one a few weeks ago, and in a much longer session with the 9mm version, I have little doubt that I will be very pleased with it. I’ve already poked around my selection of holsters, and found that the XR45 fits perfectly into a little belt slide holster I have for my Glock 21 Gen 4, as well as into a Mika Pocket Holster I use for the J-frame.

Oh, and since now a couple of us have these, guess what cartridge we’re going to test sometime next year? Yeah, the .45 Super.  And since the barrel is the same as for the .45 ACP, we’re going to revisit that cartridge and test a selection of new ammo. So, something else to look forward to!

Jim Downey

December 6, 2014 Posted by | .38 Special, .45 ACP, .45 Super, .460 Rowland, 9mm Luger (9x19) | , , , , , , , , , , , , , , , , , , , , , , , , | 7 Comments

Six shooter.

Well, well, well, BBTI made it to six years of shooting fun and research!

Yup, six years ago today we posted the first iteration of Ballistics By The Inch, and included data for 13 different handgun cartridges. Since then we’ve continued to expand on that original research, including some extensive testing on how much of an effect the cylinder gap on revolvers has, what performance differences you can expect from polygonal over traditional land & groove rifling, and added another 9 cartridges, as well as going back and including a very large selection of real world guns in all the different cartridges. This blog has had 100,000+ visitors and the BBTI site itself has had something like 25 – 30 million visits (the number is vague because of changes in hosting and record-keeping over time).

We’ve had an impact. I’ve seen incoming links from all around the world, in languages I didn’t even recognize. There’s probably not a single firearms discussion group/blog/site out there which hasn’t mentioned us at some point, and our data is regularly cited in discussions about the trade-offs you make in selecting one cartridge or barrel length over another. I’ve answered countless emails asking about specific points in our data, and have been warmly thanked in return for the work we’ve done. And on more than a few occasions people have pointed out corrections which need to be made, or offered suggestions on how we could improve the site, sometimes providing the results from their own crunching of our data.

When we started, it was fairly unusual to see much solid information on ammo boxes about how the ammunition performed in actual testing. Now that information is common, and expected. Manufacturer websites regularly specify real performance data along with what kind of gun was used for that testing. And the data provided has gotten a lot more … reliable, let’s say. We’ve been contacted by both ammo and firearms manufacturers, who have asked if they can link to our data to support their claims of performance — the answer is always “yes” so long as they make it clear that our data is public and not an endorsement of their product. And we’ve never taken a dime from any of those companies, so we can keep our data unbiased.

And we’re not done. We have specific plans in the works to test at least one more new cartridge (and possibly revisit an old favorite) in 2015. I try to regularly post to the blog additional informal research, as well as sharing some fun shooting and firearms trials/reviews. There’s already been one firearms-related patent issued to a member of the BBTI team, and we’ll likely see several more to come. Because we’re curious guys, and want to share our discoveries and ideas with the world.

So, onward and upward, as the saying goes. Thanks to all who have cited us, written about us, told their friends about us. Thanks to all who have taken the time to write with questions and suggestions. And thanks to all who have donated to help offset the ongoing costs of hosting and testing — it makes a difference, and is appreciated.

 

Jim Downey

November 28, 2014 Posted by | .22, .223, .22WMR, .25 ACP, .30 carbine, .32 ACP, .32 H&R, .327 Federal Magnum, .357 Magnum, .357 SIG, .38 Special, .380 ACP, .40 S&W, .41 Magnum, .44 Magnum, .44 Special, .45 ACP, .45 Colt, .460 Rowland, 10mm, 6.5 Swedish, 9mm Luger (9x19), 9mm Mak, 9mm Ultra, Anecdotes, Data, Discussion., General Procedures, Links, Shotgun ballistics | , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Short and fun.

Another quick post about getting together for a bit of shooting weekend before last. This time, let’s look at some semi-auto carbines.

The first two are a pair of Beretta CX4 Storms, one in 9mm and the other in .45ACP. You can see them here with the pump guns:

Table selection

I’ve previously reviewed the Cx4, and would only add that each time I shoot one of these guns I just enjoy the hell out of them. At just under 30″ overall length and weighing 5.75 pounds, they’re light, easily maneuverable, and very ergonomic. Great little pistol caliber carbines.

Now, see that gun partially visible off to the right in the pic above? And here’s another shot of it with the other pumps and carbines:

Selection

See that short little thing third from the left? Yeah, it’s an AGM-1 carbine in 9mm. Here’s a much better pic of it:

AGM

It’s an old-school bullpup, made in the 1980s in Italy. None of us had seen one before, and since it was a used gun it came with no paperwork or information. In picking it up, it felt almost too small to be civilian-legal (I mean non-NFA regulated), but the overall length is a tad over 26″ and the barrel is barely 16 and 1/8th inch. It has a little more heft than the Cx4, and most of the parts are heavy stamped steel. It uses Browning Hi-Power magazines. Interestingly, it was intended to be a modular design you could easily convert over to either .22lr or .45ACP, though I doubt the parts to do so are very common now.

But it was a surprisingly nice little gun to shoot. And when I say little, I mean it — damned thing is shorter than my arm. It was accurate, had a nice trigger, and almost no recoil. All of us were able to put a magazine full of bullets into a one-inch hole at 11 yards the first time we picked it up and tried it. Cool gun. If you ever happen to stumble across one in a shop, don’t be afraid to give it a try.

 

Jim Downey

November 25, 2014 Posted by | .22, .45 ACP, 9mm Luger (9x19), Anecdotes | , , , , , , , , , , , , , , , | 1 Comment

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