Ballistics by the inch

Wait … it’s 2014?? How did THAT happen?

2013 was a busy year for BBTI.

We did the .22Mag tests. We did the 9mm Glock Tests. I got my .460 Rowland conversion up and running. And I found some really fun .44Mag +P+ loads, then figured out a simple hack so that they would feed reliably in my lever gun. Like I said, a busy year.

And we couldn’t have done it without help. Of several types. To see the list of those donors who have helped offset some of our operating costs, pop over to the BBTI site. And here’s a list of the top-10 referring sites (excluding search engines and Wikipedia):

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

Altogether, we had 243,230 visitors to the BBTI website, and some 12,000+ views of this blog. Since we’ve gone through several iterations of the site over the last five years, it’s hard to say exactly how many visitors or pageviews or hits we’ve had in total — but it’s more than we ever really expected. Thanks, everyone.

And particular thanks to my Good Lady Wife, who has done all the webwork and most of the number crunching over the years.

We don’t currently have any concrete plans for new tests in 2014. But who knows? Keep an eye here and on our Facebook page for news.

Happy New Year, everyone!

 

Jim Downey

 

January 1, 2014 Posted by | .22WMR, .44 Magnum, .460 Rowland, 9mm Luger (9x19), Anecdotes, Data, Discussion., Links | , , , , , , , , , , , , , , , , , | 2 Comments

Some Muzzle Energy comparisons.

I got a nice note from Jason at Leaf Technologies, who had been curious about how different cartridges compared in terms of Muzzle Energy (ME). So what he did was take the data from BBTI and average the ME curves for the cartridges he was interested in, then plot them head-to-head in one Excel graph. He sent me the result, and with his permission I am sharing it here:

MEgraph

(Click to enlarge.)

I always love to see how others use our data, and the conclusions they draw from it. It’s EXACTLY the sort of thing we hoped would happen, and why we’ve made the data freely available. If you would like to read some of Jason’s conclusions, and the discussion they engender, pop over to the Northeast Shooters Forum.

And if you have your own interesting spin on how our data can be used in a new way, drop me a note. If I think it’d be of interest to others, I’ll be happy to post it here/link to it. Just send an email to jimd@ballisticsbytheinch.com

 

Jim Downey

December 12, 2013 Posted by | .357 Magnum, .357 SIG, .380 ACP, .40 S&W, .45 ACP, 10mm, 9mm Luger (9x19), Data, Discussion., Links | 1 Comment

Happy Thanksgivuk … er, I mean Birthday!

OK, first: Happy Thanksgiving to all my fellow Americans. And Happy Hanukkah to all who observe it!

But most of all,

Happy Birthday to BBTI!

Yeah, it’s our fifth birthday. We officially launched the site on Thanksgiving in 2008.  And it’s been a fun romp since then. We’ve gone through many different iterations on the site, adding in more calibers/cartridges, doing the big cylinder gap test, tweaking this and changing that. We’ve shot something on the order of 22,000 – 23,000 rounds. We’ve had something in excess of 20 million hits to the site. We’ve invested more than $50,000 and untold hundreds of hours of labor. And we’ve become pretty much the default resource for anyone who has needed (or just wondered about) data pertaining to handgun ammunition performance over barrel length. Like I said, it’s been fun! Thanks for helping to make it so!

And since it is our birthday, it’s time for a gift in the form of a whole new section to the BBTI website:

Polygonal v. Traditional L&G Rifling (“Glock tests”)

From that page:

For years people have wondered about the effects of the different styles of rifling, and whether one or the other would offer specific advantages for accuracy or velocity from a given cartridge.  But since many different factors can have an effect on both accuracy and velocity, these discussions have largely remained anecdotal.  We decided to see whether we could generate data as to performance differences between the two styles of rifling as concerns bullet velocity, using our standard chop-test techniques.  The data on this page is the result of those tests.

Check it out when you get a chance! And thanks again to all who have shared links to our site, who have sent us emails, who have contributed to help offset our costs — you folks have made our success possible, and it is very much appreciated.

 

Jim Downey

PS: as a personal thanks as well, I have made both my first novel and our care-giving memoir available for free download for today and tomorrow (Nov. 28th & 29th).

November 28, 2013 Posted by | 9mm Luger (9x19), Anecdotes, Data, Discussion., Links | , , , , , , , , , , , , , , , , , | 1 Comment

With charts! Graphs! Slo-mo!

John Ervin at Brass Fetcher Ballistic Testing has put together another great video presentation, showing in several ways how Jacketed Hollow Point (JHP) ammo performs in comparison to Full Metal Jacket (FMJ) ammo for 9 different handgun cartridges. It’s long (22 minutes), but very nicely documents just exactly how the two different bullet styles behave at handgun velocities. Here’s the video:

 

 

The cartridges covered are .22 LR, .25 ACP, .32 ACP, .380 ACP, 9mm Makarov (9×18), 9mm Police (Ultra), .38 Special, 9mm Luger (9×19), and .45 ACP.  His data and presentation makes a great companion to our own data, and I really recommend that you set aside the time to watch the video at your earliest convenience.

 

Jim Downey

October 22, 2013 Posted by | .22, .25 ACP, .32 ACP, .38 Special, .380 ACP, .45 ACP, 9mm Luger (9x19), 9mm Mak, 9mm Ultra, Data, Discussion., Links | , , , , , , , , , , , , , , , , , , , , , | Leave a comment

How long is too long?

We’ve long known that many pistol calibers/cartridges are optimized for fairly short barrels — you see real benefits in increasing barrel length out to 6″ or 8″ or so, with diminishing returns beyond that. (The exception to this is the ‘magnum’ rounds: .44mag, .357mag, etc.) It’s not that you don’t see any benefit in a longer barrel, but the gain tends to flatten out. Take a look at the muzzle energy graph for the 9mm Luger (9×19) and this is quickly apparent:

Take a look at the left side of that graph. There’s some indication that the bullets are actually slowing down in the last couple of inches of an 18″ barrel. Whether or not this is just a glitch in our earlier test data, or an indication that friction is starting to win out over the remaining energy from the expanding gas of a fired cartridge is something I’ve always wondered about. Clearly, at some point a bullet will start to slow down, even stop; anyone who has ever fired a squib load and had to hammer the bullet out of a barrel knows that this can indeed happen. But at what point would this effect start to be clear?

Good question. And not one we really wanted to spend the money on to find out. See, the barrel blanks we’ve used all along came in an 18″ length standard for pistol calibers/cartridges. Longer barrels were available from different sources, but there was a big jump up in price for those, and it just didn’t make much sense to get into that.

However …

When we started to set up to do the so-called “Glock Tests” we had to find a different source for our barrel blanks, since our other supplier couldn’t provide a polygonal barrel (the kind of barrel Glock uses, though they are not unique in this). We sourced the barrels from Lothar Walther. And as it turned out, their barrel blanks are longer than 18″. Specifically, we received a 26″ barrel with traditional land-and-groove rifling and a 24″ barrel with polygonal rifling. Here they are:

9mm barrel blanks

9mm barrel blanks

So …

Well, we didn’t want to spend the time and money doing full chop tests from 26/24 inches down to 18″. But we did decide to just go ahead and get some benchmark data at the full length, just for shits and grins. And here is the data for those lengths, along with data from 18″, 17″, and 16″ lengths for comparison:

PNW Arms STD P 115gr SCHP

Trad:    1074 fps     1161 fps     1163 fps     1171 fps
Poly:    1064 fps     1131 fps     1131 fps     1135 fps

Federal STD P 115gr Hi-Shok

Trad:     1305 fps     1330 fps     1333 fps     1330 fps
Poly:     1323 fps     1331 fps     1336 fps     1135 fps

CorBon +P 115gr DPX

Trad:     1117 fps     1232 fps     1249 fps     1236 fps
Poly:     1057 fps     1186 fps     1195 fps     1208 fps

Black Hills +P 115gr JHP

Trad:     1494 fps     1508 fps     1512 fps     1498 fps
Poly:     1496 fps     1521 fps     1515 fps     1518 fps

Federal STD P 147gr JHP

Trad:     1036 fps     1061 fps     1084 fps     1085 fps
Poly:     1046 fps     1088 fps     1098 fps     1088 fps

So, there ya go: in each and every case, there is a noticeable decrease in velocity in going from an 18″ barrel to either the 24″ or 26″ barrel. And keep in mind that the protocols for this test were 10 shots of each ammo at each barrel length over two chrono units, rather than just 3 shots as we had done for previous chop tests.

Not too surprising, but nice to see actual data.

We hope to have the full data sets, with charts & graphs, up on the website soonish (maybe next week?). Watch here and on our FaceBook page for a posting when it is available.

 

Jim Downey

October 11, 2013 Posted by | 9mm Luger (9x19), Anecdotes, Data, Discussion., General Procedures | 3 Comments

M1 .30 carbine performance.

Got another nice email with a video link from John Ervin at Brass Fetcher Ballistic Testing, this time covering the performance of the venerable M1 Carbine .30 cal cartridge. From John:

Despite its handsome wood furniture and vaguely military-type appearance, the M1 Carbine is an effective firearm for self-defense and small game hunting.  Hornady makes ‘Critical Defense’ ammunition for it now and Federal continues to make its excellent 110gr SP, so good ammunition choices are available for M1 Carbine owners.

The M1 Carbine is excellent for its low recoil, small mechanical sight offset and cartridge that is sufficient in lethality to repulse human attackers (when using good soft point ammunition) at distance.

And here’s the video so you can see for yourself:

 

 

I’ll leave it at that for now … I have a lot to do this week to get ready for our 9mm “Glock Tests” this coming weekend. Yup, those are finally happening. I’ll post some preliminary thoughts/results probably this weekend or the first of next week, with full info to come after we have a chance to crunch the numbers a bit.

 

Jim Downey

October 1, 2013 Posted by | .30 carbine, 9mm Luger (9x19), Data, Discussion., Links | , , , , , , , , , , , , , | Leave a comment

Ammo shortage? What ammo shortage??

Oh — THAT — ammo shortage.

Yeah, the beginning of January I wrote that we were finally moving forward with the testing of polygonal vs. traditional rifling; the so-called “Glock Tests“, and outlined how we were planning on conducting a bit of an experiment in asking for suggested ammo loads to include in the tests, and then seeing what kind of support there was for a slate of different choices by allowing pledges to help purchase ammo.

But, as someone who wrote me put it: where did we think we were going to *find* any such ammo?

Initially, I thought that the shortage we were seeing would be a fairly temporary problem, and that by the time spring rolled around we’d be able to locate sufficient quantities for our testing (we need about 350 rounds of each type).

Yeah, so much for that idea. Now you know why I don’t play the stock market or bet on races.

The ammo shortage has just continued to deepen. It’s to the point where people are having a hard time finding enough of any kind of ammo just to keep in practice with a trip to the range once or twice a month.  I’m damned glad I reload my practice ammo, and have a decent store of most components.

But that doesn’t do a damned thing for our testing. The whole idea is to test factory ammo, not some cobbled-together handload version of factory ammo.

So we’re putting off the “Glock Tests” again, until the situation gets better. Keep an eye here and elsewhere for news about when this will change.

One good bit of news, however: we already had a decent selection and sufficient quantity of each ammo type to do the .22WMR (.22Magnum) tests.  So we’re going to go ahead and do that sequence of tests here this spring — sometime soon!

Sorry for the bad news, everyone — really. These tests have been delayed several times for one (good) reason or another, and we’re just as frustrated by that as everyone else.  But when ammo supplies start to become more available, we’ll be sure to try and get them done as soon as we can.

Cheers!

Jim Downey

March 4, 2013 Posted by | .22WMR, .45 ACP, 9mm Luger (9x19), Anecdotes, Data, Discussion., General Procedures | , , , , , , , , , , , , , , , | Leave a comment

Now, about those “Glock” tests…

As mentioned previously, for some time we’ve been planning on doing a series of inch-by-inch chop tests on the Glock-style polygonal barrels  (Glock was unable to supply 18″ barrels, so we’ll be using 6 grove poly and 6 land traditional barrels from Lothar Walther).  We’ve run into a number of unexpected delays, but now have the barrels we need, and are planning on doing the series of tests sometime later this year, hopefully in spring/early summer. For testing purposes, we’ll be conducting traditional ‘land & groove’ barrels in the same calibers at the same time, so that we have direct head-to-head comparisons. Because we’re expecting a fairly subtle difference in performance, we’re going to do 10 (ten) shots for each inch of barrel for both style barrels. And to keep the scope of the project manageable, we’re only going to test two cartridges/calibers: 9mm (9×19) and .45 ACP.

In order to do the tests this way, we’ll need a minimum of 340 rounds of each ammo to test. Add in “real world guns” and allowing for errors/glitches which mean extra shots, we’re planning on getting 400 rounds of each ammo to be tested. Figure an average of about $1 per round for premium self-defense ammunition, and we’re looking at about $400 for each ammo selected for testing. There are some specific ammunition types/loads we’ve tested previously that we want to revisit for comparison purposes, but our selection is hardly comprehensive — time and money are limited.

So we’d like to try an experiment: do Kickstarter-style crowdfunding to see what ammunition types/loads people want to have us test. This will allow two things:

  1. To let people help support the project by offsetting our costs.
  2. To help us find new ammunition types/loads.

Now, Kickstarter itself isn’t firearm-friendly. And that’s OK — we can do this on our own, just using our own site. What we’ll do is put up a list of different ammo types/loads, and solicit donations targeted for each during a specific time frame. When pledges are made, we’ll keep a running tally total for each ammo, and once it crosses a certain threshold, then that specific type/load will be added to our testing list.

But first we need to create our list of ammo. So, for the next two weeks, either add a comment to this blog post or send an email to info@ballisticsbytheinch.com with one specific 9mm ammunition type/load you would like to see us test. Please, just one type/load per comment or email, and just five or six such entries per person. I’m going to have to collate these myself, so help make it a little easier on me. Just sending in a selected ammo doesn’t obligate you to support that ammo with $ in the second phase of this test, but it’s probably a good idea to only recommend ammo you would be willing to actually support, and ones you think you can get others to support. And remember, keep your recommendations limited to factory mass-produced ammo; handloads or artisanal ammo which the average person doesn’t have access to will not be selected for inclusion in the tests. Also: we’re only accepting recommendations and donations from individuals, not ammo manufacturers.

You can see all the 9mm ammo we’ve tested previously here: 9mm Luger Results.

As I said, this is an experiment. If it works for selecting 9mm ammo to test, we may extend it to the .45 ACP tests, and then see about using a similar approach for other testing. We hope that this will be a way we can expand our research and make it more responsive to what data the firearms-enthusiast community wants to see. You can help by sending in your suggestions, but in also spreading the word on the different forums/blogs where our data may be used.

Thanks, everyone, for your ongoing interest and support!

Jim Downey

January 4, 2013 Posted by | .45 ACP, 9mm Luger (9x19), Data, Discussion. | , , , , , , , , , , | 3 Comments

Last chance.

So, we have a new winner! Kyle won the all-leather IWB of unknown make.

The next, and final, holster in our drawing is very much a known brand: a High Noon Holsters “Skin Tite” model leather OWB. This is a right-handed almost new holster which has a $54.95 value (plus shipping).

This particular holster is marked for a Steyr M. But just about any medium-large semi will fit (though the retention snap may not be in the perfect position). Interestingly, both a full-size 1911 and my Ruger Mark I fit perfectly (with the barrel protruding out the bottom).

Rules are the same as previously:

So, here’s the deal: make any kind of contribution to the Kickstarter (as little as $1.00 – I won’t mind), and enter into this drawing for a holster. Please note that this is *IN ADDITION* to the other rewards there on the Kickstarter – all perfectly good and valuable rewards. Then just come here and leave a comment, or post it on the BBTI Facebook page, or send me a Tweet. I’ll enter your name into a completely separate drawing. And next Wednesday after the Kickstarter is over I’ll select a name and send that person this holster is up for grabs.

If you’ve already contributed to the Kickstarter, just let me know and your name will go in the hat for this drawing.

Last chance – get your entries in and help me out with making the Kickstarter a success! Thanks!

Jim Downey

October 12, 2012 Posted by | .22, .357 SIG, .40 S&W, .45 ACP, .460 Rowland, 10mm, 9mm Luger (9x19), 9mm Mak, 9mm Ultra, Discussion., Links | Leave a comment

Up next …

… in my holster give-away is a very sweet all leather IWB of unknown make. It’s non-molded, and should accommodate almost any semi from medium to full size. Here are some pix of it with my Steyr M357:

 

 

 

But I also checked to see whether the following would fit:

Smaller semi-automatics and derringers do fit, but sit so far down inside the holster that they are difficult to retrieve.

Same rules as previously:

So, here’s the deal: make any kind of contribution to the Kickstarter (as little as $1.00 – I won’t mind), and enter into a drawing for a holster. Please note that this is *IN ADDITION* to the other rewards there on the Kickstarter – all perfectly good and valuable rewards. Then just come here and leave a comment, or post it on the BBTI Facebook page, or send me a Tweet. I’ll enter your name into a completely separate drawing. And each week or so while the Kickstarter is going I’ll select a name and send that person whichever holster is up for grabs. Each winner’s name will go back into the hat for the next drawing, so you have multiple chances to win (meaning that the sooner you enter, the better for you).

If you’ve already contributed to the Kickstarter, just let me know and your name will go in the hat for the first drawing (and subsequent ones).

I will draw a winner next Friday, Oct 12.

And here’s a heads-up: the final drawing will occur on Wednesday, Oct. 17, — the day after the Kickstarter ends. And that item will be a High Noon Skin Tite holster. Remember – you just need to “enter” once, and you will automatically be added to both drawings. So, what are you waiting for? Go register!

 

Jim Downey

 

 

October 6, 2012 Posted by | .357 SIG, .38 Special, .45 ACP, 9mm Luger (9x19), Discussion., Links | 2 Comments

The $1 freebie – PLUS!

So, I have another free promotional day running on my novel Communion of Dreams today. All the info about it is in this blog post: the $1 freebie.

That’s all well and good. But as noted previously, I am offering BBTI fans a little something extra:

That’s a pair of Versacarry holsters with a paperback copy of the book. These are both for .380/9mm/.357 Sig barrel guns, and are the “small” and “medium” sizes.

If you’re not familiar with the Versacarry, here’s a good review by one of the other Guns.com writers. I’ve tested these two holsters, and found them to be an interesting and potentially useful minimalist IWB holster.

But as I noted previously, I’m not a fan of IWB. So I’m giving both of these Versacarry holsters away. Same rules as last time:

So, here’s the deal: make any kind of contribution to the Kickstarter (as little as $1.00 – I won’t mind), and enter into a drawing for a holster. Please note that this is *IN ADDITION* to the other rewards there on the Kickstarter – all perfectly good and valuable rewards. Then just come here and leave a comment, or post it on the BBTI Facebook page, or send me a Tweet. I’ll enter your name into a completely separate drawing. And each week or so while the Kickstarter is going I’ll select a name and send that person whichever holster is up for grabs. Each winner’s name will go back into the hat for the next drawing, so you have multiple chances to win (meaning that the sooner you enter, the better for you).

If you’ve already contributed to the Kickstarter, just let me know and your name will go in the hat for the first drawing (and subsequent ones).

So, what are you waiting for? Go register!

I’ll draw a name from those submitted on Friday, Oct. 5th.

Jim Downey

September 30, 2012 Posted by | .357 SIG, .380 ACP, 9mm Luger (9x19), 9mm Mak, 9mm Ultra, Discussion., Links | 4 Comments

Take a chance on a holster.

I haven’t mentioned it here yet, but last weekend I launched a Kickstarter project to support my next novel:

St. Cybi’s Well – a prequel to Communion of Dreams by Jim Downey

Prequel to the popular novel Communion of Dreams. Get an early release download or a hand-bound copy in your choice of cover material.

So, *why* am I mentioning it here now?

Well, yesterday I got an unexpected box in the mail. Sometime a few weeks back I contributed a few bucks to a firearms-related website, and was entered into a drawing for various goodies. I never win these things, but participate just to be supportive of groups I like. Anyway, as you might have guessed, I actually won something for a change. This is what the box contained:

Here’s the holster with my Springfield EMP in it:

This is a perfectly nice holster, made by Woodenleather.com.  It’s marked as being for an “L-frame” S & W revolver with a 2.5″ barrel, but as you can see it isn’t molded specifically for that, and seems suitable for IWB use with a range of medium-to-small guns. I also tried my Steyr S9 and M357 guns, which fit perfectly, and smaller guns such as a Bond Arms derringer would also work, but ride deeper in it. A full-size 1911 and my Colt Python both fit fine, but the barrel protrudes out the end.

Now, the thing is, while this is a mighty fine holster, it’s made to be either used IWB or OWB left-handed. Note the position of the clip in the second image above. To me, it’s useless (or almost so). As I was thinking of how to find a new home for it, I also got to thinking about several other holsters of varying quality I have which I have wound up with but which I never use and I had another idea: use them for a promotion for the Kickstarter.

So, here’s the deal: make any kind of contribution to the Kickstarter (as little as $1.00 – I won’t mind), and enter into a drawing for a holster. Please note that this is *IN ADDITION* to the other rewards there on the Kickstarter – all perfectly good and valuable rewards. Then just come here and leave a comment, or post it on the BBTI Facebook page, or send me a Tweet. I’ll enter your name into a completely separate drawing. And each week or so while the Kickstarter is going I’ll select a name and send that person whichever holster is up for grabs. Each winner’s name will go back into the hat for the next drawing, so you have multiple chances to win (meaning that the sooner you enter, the better for you).

If you’ve already contributed to the Kickstarter, just let me know and your name will go in the hat for the first drawing (and subsequent ones).

So, what are you waiting for? Go – get entered!

Jim Downey

September 21, 2012 Posted by | .357 Magnum, .357 SIG, .45 ACP, 9mm Luger (9x19), Discussion., Links | , , , , , , , , , , , , , , , , , , , , | 2 Comments

And once again…

…I am reminded of how happy I am to not have to deal with the public day in and day out.

As I said two months ago:

People really will always find something to bitch about, won’t they? Even if it is free & unencumbered research data that they can’t get elsewhere.

This time I got a complaint from someone about our having excluded a particular make of handgun. No “Hey, thanks for the data, I wonder why you haven’t tested This Brand?” Or “I love the site, but is there a reason why you’ve not included This Brand?” Just an email with the header “WHY NO GLOCKS TESTED?” Yeah, all caps. Nothing else other than the question repeated in the body.

I actually get some variation of this  question just about every week. Let me rephrase that: at least every week. Which is why that question is at the top of the FAQ on the BBTI site.

I responded, as I usually do, with that link and some variation of: “we didn’t include them because we hate them” (which is joking off of what the FAQ says). Usually this takes care of the issue.

But sometimes people either don’t go look at the FAQ, or are too dense/sarcasm-impaired to “get” my response. That was the case with the current querent. After a couple more exchanged emails I finally convinced him that we don’t actually hate Glocks.

But the truth is, we *have* intentionally excluded Glocks so far. As I told my querent in my final email:

There are a lot of different factors which go into the selection of the guns we include in our tests. Glocks have a different barrel structure, so comparing them with the ‘standard’ rifling tends to skew results. For this reason we’ve so far avoided including them.

I say “so far” because we’re presently in the process of finalizing a test sequence where we do the formal inch-by-inch chop tests on Glock polygonal barrels. It’s taken us two years to be able to get the necessary 18″ blanks to do this properly. Having that data will allow us to do head-to-head comparisons with the ‘standard’ rifling results, and so give everyone data which actually is useful rather than just anecdotal. And yes, as part of that sequence we will be testing actual Glocks in different calibers and with different barrel lengths. We hope to be able to conduct these tests yet this fall, but are waiting on the gunsmithing work to be done.

This isn’t actually “news” – I hinted at it in June on the BBTI Facebook page (which you should “Like” if you’re on FB, so you see these things sooner), but it is the first I’ve mentioned it here or on any forums.

Anyway, yeah, I’m glad I don’t have to deal with the public on a daily basis any longer. My blood pressure problems would be a lot worse than they actually are.

Jim Downey

August 29, 2012 Posted by | .45 ACP, 9mm Luger (9x19), Data, Discussion., General Procedures, Links | , , , , , , , , , | 2 Comments

…bring May flowers.

Well – I see that I didn’t post stats last month for March. Sorry about that – a combination of being busy promoting my novel as well as getting together with some of the other BBTI guys to do some fun shooting (and to try out a .460 Rowland conversion kit for a Glock 21!).

So, first things first: March had a total of 21,499 visitors, and April had 19,918 visitors. Just a bit of a slow period there.

Next, remember that we’re now linking from the BBTI page on Real World Guns to reviews of said guns I’ve written for Guns.com. There are usually a couple new each week, so check back often!

And here is the first of some additional reviews from my shooting expedition the beginning of April: Wise Lite Arms Sterling 9mm. Coming weeks should see more than a dozen other reviews of handguns and PCCs (pistol caliber carbines).

A quick note that things with my novel have been going great, and so far some 14,000 people have downloaded the Kindle edition. If you enjoy my reviews and articles, then you may want to check out the book – it’s been getting a lot of really good discussion and reviews.

May 1, 2012 Posted by | .460 Rowland, 9mm Luger (9x19), Anecdotes, Links | , , , , , , , , , , , | Leave a comment

It’s Up!

The new Ballistics By The Inch site is now up and running! Bigger, Faster, And with More DATA! Take a look, spread the word, let us know if there are any glitches or problems.

Jim Downey

December 1, 2011 Posted by | .22, .223, .25 ACP, .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, 9mm Luger (9x19), 9mm Mak, 9mm Ultra, Anecdotes, Data, Discussion., General Procedures, Links | , , , , | Leave a comment

Interesting development.

Interesting – for the first time, I’ve seen someone use the BBTI data as a baseline for whether or not to trust claims by an ammo manufacturer about the performance of other ammo which we haven’t tested. Here’s the quote from a discussion on THR:

As Mayo has already said, it’s from Corbon. If you will check Corbons velocity claim for other loads with the ballistic by the inch’s real gun tests of the same loads, you will see they are very close. Therefore I’m comfortable with using the Corbon site data for this load.

Perhaps a subtle distinction, but to a certain extent it moves our data into the category of being the trusted independent research by which other things are measured. Very interesting, indeed.

Jim Downey

(Oh, something else: my latest article is up on Guns.com, and now my byline also has links to all my other articles, if you’re interested.)

May 20, 2011 Posted by | .380 ACP, 9mm Luger (9x19), Data, Discussion. | Leave a comment

New round of .380 ACP tests.

Well, it was a fun couple of days this week out at Camp BBTI – doing a new round of testing, primarily focused on the .380 ACP cartridge (9x17mm). This has become an increasingly popular cartridge used for small self-defense guns, so we decided to expand the different ammos we tested using the BBTI ‘chop tests’ as well as a dozen real world guns. You can see the guns here:

And here’s a great pic of Jim K and Keith at the shooting table, getting ready to shoot the 4″ barrel:

We also did the full chop tests (as well as a real world gun) on 9mm Makarov and 9mm Ultra – two cartridges which are between a .380 and the 9mm Parabellum in terms of power/performance. We’ll post the full data on the BBTI site as soon as everything is crunched and ready – but for now let me just say that heretofore I haven’t been a big fan of the .380, but with the right ammunition I’d consider carrying a gun in that caliber. We were all surprised at how well the Buffalo Bore rounds performed at even the 2″ barrel length.

Jim Downey

Cross posted to my personal blog.

August 26, 2010 Posted by | .380 ACP, 9mm Luger (9x19), Data, Discussion. | Leave a comment

Wiki, oh Wiki, where do you roam?

Just spent a chunk of the afternoon and early evening doing something I had been meaning to do for at least a year: adding info about BBTI to various and sundry Wikipedia pages about ballistics and cartridges. I still need to create an actual ‘page’ about BBTI, but haven’t ever done that, so . . .

Anyway, now for all the cartridges/calibers we tested there are links on Wikipedia, plus any related entries that I could think of. But if you find yourself poking around there, and come across an entry which would appropriately link/mention BBTI, please edit it to do so (or drop me a note and I’ll take care of it.) This isn’t an effort to get more hits to the BBTI site (we’re rapidly approaching 2.5 million), but just to help more people get the information that they need.

Jim Downey

April 30, 2010 Posted by | .25 ACP, .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, 10mm, 9mm Luger (9x19), Data, Discussion., Links, Uncategorized | 2 Comments

17k

This post was originally posted to my personal blog, but I thought it might also be of interest here. – JD

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Feeling better, though still not entirely over the gut-bug. But I thought I would share some numbers with you.

In the six or so weeks since the last update, another 1,500 people have downloaded Communion of Dreams, which puts the total number of downloads at 17,000. This makes me happy. And we have a small publisher who is interested in the book. Maybe.

In other number news, BBTI continues to get a lot of hits. July had over 100,000, and that puts the total so far at 1,126,943. This also makes me happy. Feedback generally on the whole project continues to be positive, though we’re always getting comments like this:

ANALYZING UR STATS for 9mm, KEL-TEC (which I own). Dont know when this study was done. looks like maybe mid ’2008??? which is current enough to be relevant. However…
> WRONG AMMO for analysis w/KEL-TEC. ANYTHING with a long barrel should ALWAYS use +P or +P+ to take advantage of – via specific brands at that. FEDERAL & SPEER ARENT right choice because they’re specifically designed for short-barrel. “Fps gain” would expectantly be marginal over short barrel. CORBON might be close to reality – but this is only marginal. Would LOVE to see something like BUFFALO BORE or DOUBLE TAP +P/+P+ 124gr & 147gr put thru these. This is what I shoot all the time with it, and can only base “visual” on what I think… would bet its substantial “fps gains” over pistol barrel, then.
Any chance of u updating ur chart to include some +P super-stuff specifically? Would even volunteer to send u a box or 2 of the BUffalo Bore if I could get a “yes” commitment from u!!

*sigh* Proof that, no matter what you do, somebody, somewhere, will bitch about it. It’s just the way people are.

But you can’t let that drive you nuts.

Too much. ;)

Jim Downey

August 1, 2009 Posted by | 9mm Luger (9x19), Anecdotes, Data, Discussion. | Leave a comment

Closing in on a million.

Just under a month ago I wrote about launching the major upgrade to BBTI. Since then, we’ve had 217,390 hits to the site, bringing us to just shy of one million hits (986,999) as of midnight. Given how things have been going the last couple of days, I expect we’ll break a million today or tomorrow. [edited to add: we had over 21 thousand hits on 6/27, thereby crossing a million.]

And that’s kinda cool.

So, thanks to all who passed along word of our project. In particularly, our top ten referrers have been:

  1. www.darkroastedblend.com
  2. www.google.com
  3. www.defensivecarry.com
  4. www.thefirearmblog.com
  5. www.ar15.com
  6. www.thehighroad.org
  7. www.thefiringline.com
  8. ballisticsbytheinch.wordpress.com
  9. forums.somethingawful.com
  10. www.saysuncle.com

I find it interesting that the top referrer (by a long shot) isn’t even a firearms-related site. That we’ve risen high in Google searches comes as very little surprise, and I’m pleased that the BBTI blog itself has such a prominent spot, just after five of the best known gun forums/blogs. That’s kinda cool, too.

Anyway, thought I would pass this bit of good news along.

Jim Downey

(Cross posted to my personal blog.)

June 27, 2009 Posted by | .25 ACP, .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, 10mm, 9mm Luger (9x19), Data, Links | 1 Comment

Follow

Get every new post delivered to your Inbox.