Ballistics by the inch

Reprise: Is Muzzle Energy Really a Measure of Handgun Effectiveness?

Prompted by my friends over at the Liberal Gun Club, this is another in an occasional series of revisiting some of my old articles which had been published elsewhere over the years, perhaps lightly edited or updated with my current thoughts on the topic discussed. This is an article I wrote for Guns.com, and it originally ran 2/13/2012. Some additional observations at the end.

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Would you rather be shot with a modern, Jacketed Hollow Point bullet from a .32 ACP or have someone throw a baseball at you? Seems like a silly question, doesn’t it? But did you know that the ‘muzzle energy’ of the two is about the same? Seriously, it is and that’s just one reason why trying to use muzzle energy as a measurement of handgun effectiveness is problematic.

Calculating Muzzle Energy

First off, what is ‘muzzle energy’ (ME)? Wikipedia has a pretty good description and discussion of it. Here’s the simple definition:

Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle of a firearm. It is often used as a rough indication of the destructive potential of a given firearm or load. The heavier the bullet and the faster it moves, the higher its muzzle energy and the more damage it will do.

For those who are trying to remember your high school physics, kinetic energy is the energy (or power) of something moving. You can calculate kinetic energy using the classic formula:

E = 1/2mv^2

Which is just mathematic notation for “Energy equals one-half the mass of an object times the square of its velocity.”

Doing the actual calculations can be a bit of a pain, since you have to convert everything into consistent units, but the formula is there on the Wikipedia page (and can be found elsewhere) if you want to give it a go. Fortunately, there are a number of websites out there which will calculate muzzle energy for you – you just plug in the relevant numbers and out comes the result. We also have muzzle energy graphs for all the calibers/ammunition tested at BBTI.

Batter up?

If you go through and check all the muzzle energy numbers for handguns with a 6″ or less barrel which we’ve tested (BBTI that is), in .22, .25. or .32, you’ll see that all except one (and you’ll have to go to the site to see which one it is) comes in under 111 foot-pounds.

Why did I choose that number? Because that would be the kinetic energy of a baseball thrown at 100 mph. Check my numbers: a standard baseball weighs 5.25 ounces, which is about 2,315 grains. 100 mph is about 147 fps. That means the kinetic energy of a baseball thrown at 100 mph is 111 ft-lbs.

Now, we’re not all pro baseball pitchers. And I really wouldn’t want to just stand there and let someone throw a baseball at me. But I would much rather risk a broken bone or a concussion over the damage that even a small caliber handgun would do.

The Trouble with Muzzle Energy

And therein lies the problem with using muzzle energy as the defining standard to measure effectiveness: it doesn’t really tell you anything about penetration. A baseball is large enough that even in the hands of Justin Verlander it’s not going to penetrate my chest and poke a hole in my heart or some other vital organ. If I catch one to the head, it may well break facial bones or even crack my skull, but I’d have a pretty good chance of surviving it.

Now, I think muzzle energy is a useful measure of how much power a given handgun has. That’s why we have it available for all the testing we’ve done on BBTI. But it is just one tool, and has to be taken into consideration with other relevant measures in order to decide the effectiveness of a given gun or caliber/cartridge. Like measures such as depth of penetration. And temporary and permanent wound channels. And accuracy in the hands of the shooter. And ease of follow-up shots. And ease of carry.

I’ve seen any number of schemes people have come up with to try and quantify all the different factors so that you can objectively determine the “best” handgun for self defense. Some are interesting, but I think they all miss the point that it is an inherently subjective matter, where each individual has to weigh their own different needs and abilities.

Sure, muzzle energy is a factor to consider. But I think the old adage of “location (where a bullet hits) is king, and penetration is queen” sums it up nicely.

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In the five years since I wrote that, my thinking has evolved somewhat. Well, perhaps it is better to say that it has ‘expanded’. I still agree with everything above, but I’m now even more inclined to go with a relatively heavy bullet for penetration over impressive ME numbers. I think that comes from shooting a number of different brands of ammo where the manufacturer has chosen to go with a very fast, but very light bullet to get an amazing ME, with the argument that this is more likely to cause some kind of terminal shock, citing tests showing significant ‘temporary wound channels’ and such in ballistic gel.

But you really can’t cheat physics. If you dump a lot of kinetic energy very quickly into creating a temporary wound channel, then you have less energy for other things. Like penetration. Or bullet expansion. And those are factors which are considered important in how well a handgun bullet performs in stopping an attacker. That’s why the seminal FBI research paper on the topic says this:

Kinetic energy does not wound. Temporary cavity does not wound. The much discussed “shock” of bullet impact is a fable and “knock down” power is a myth. The critical element is penetration. The bullet must pass through the large, blood bearing organs and be of sufficient diameter to promote rapid bleeding. Penetration less than 12 inches is too little, and, in the words of two of the participants in the1987 Wound Ballistics Workshop, “too little penetration will get you killed.” Given desirable and reliable penetration, the only way to increase bullet effectiveness is to increase the severity of the wound by increasing the size of hole made by the bullet. Any bullet which will not penetrate through vital organs from less than optimal angles is not acceptable. Of those that will penetrate, the edge is always with the bigger bullet.

 

Now, you can still argue over the relative merits of the size of the bullet, and whether a 9mm or a .45 is more effective. You can argue about trade-offs between recoil & round count. About this or that bullet design. Those are all completely valid factors to consider from everything I have seen and learned about ballistics, and there’s plenty of room for debate.

But me, I want to make sure that at the very minimum, the defensive ammo I carry will 1) penetrate and 2) expand reliably when shot out of my gun. And if you can’t demonstrate that in ballistic gel tests, I don’t care how impressive the velocity of the ammo is or how big the temporary wound cavity is.

So I’ll stick with my ‘standard for caliber’ weight bullets, thanks. Now, if I can drive those faster and still maintain control of my defensive gun, then I will do so. Because, yeah, some Muzzle Energy curves are better than others.

 

Jim Downey

April 16, 2017 Posted by | .22, .25 ACP, .32 ACP, .45 ACP, .45 Super, 9mm Luger (9x19), Data, Discussion., Links | , , , , , , , , , , , , , , , , , , , , , , | 1 Comment

Reprise: So, You Say You Want Some Self-Defense Ammo?

My friends over at the Liberal Gun Club asked if they could have my BBTI blog entries cross-posted on their site. This is the second in an occasional series of revisiting some of my old articles which had been published elsewhere over the years, perhaps lightly edited or updated with my current thoughts on the topic discussed. This is an article I wrote for Guns.com, and it originally ran 2/16/2011. Some additional observations at the end.

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You need to choose self-defense ammunition for your gun. Simple, right? Just get the biggest, the baddest, the most powerful ammunition in the correct caliber for your gun, and you’re set, right?

Wrong. Wrong, on so many levels.  For a whole bunch of reasons. We’ll get to that.

Shooters have earned the reputation as an opinionated breed and arguments over ammunition are a staple of firearms discussions, and have been for at least the last couple of decades. Much of this stems from the fact that every week it seems, you’ll see “fresh” claims from manufacturers touting this new bullet design or that new improvement to the gunpowder purportedly to maximize power or minimize flash.  And the truth is there have been a lot of improvements to ammunition in recent years, but, if you don’t cut through the hype you can easily find yourself over-emphasizing the importance of featured improvement in any given ammunition.

Perhaps it’s best to consider it by way of example.  While the basic hollowpoint design has been around since the 19th century, I remember when simple wadcutters or ball ammunition was about all that was available for most handguns. Cagey folks would sometimes score the front of a wadcutter with a knife (sometimes in a precarious manner—please don’t do this Taxi Driver-style with live ammunition) to help it ‘open up’ on impact. Jacketed soft point ammunition was considered “high tech” and thus distrusted. And yet, these simple bullets stopped a lot of attacks, killed a lot of people and saved a lot of lives.

I’m not saying that you don’t want good, modern, self-defense ammunition. You probably do. I sure as hell do. I want a bullet designed to open up to maximum size and still penetrate properly at the velocity expected when using it. If you are ever in a situation where you need to use a firearm for self-defense, you want it to be as effective as possible in stopping a threat, as quickly as possible.

Modern firearms are not magic wands. They are not science-fiction zap guns. How they work is they cause a small piece of metal to impact a body with a variable amount of force. That small piece of metal can cause more or less damage, depending on what it hits and how hard, and how the bullet behaves. Here’s the key that a lot of people forget: as a general rule, location trumps power.  All you have to do is meditate on the fact that a miss with a .44 magnum is nowhere  near as effective as a hit with a .25 ACP.  And when I say “a miss” I’m talking about any shot which does not hit the central nervous system, a major organ, or a main blood vessel (and even then it matters exactly which of these are hit, and how). Plenty of people have recovered from being shot multiple times with a .45. Plenty of people have been killed by a well-placed .22 round.

Hitting your target is what is most important and for most of us that is harder to do with over-powered ammunition we’re not used to shooting regularly. Chances are that under the stress of an actual encounter, your first shot may not be effective at stopping an attack. That means follow-up shots will be needed, and you’d better be able to do so accurately. If you can’t get back on target because of extreme recoil, then what’s the point of all that extra power?  If you can’t get back on target because you’ve been blinded by the flash of extra powder burning after it leaves the muzzle, well hell, that’s not good either.

Nestled up alongside power is having an ammunition that will actually work well in your gun. Some guns are notoriously ammunition sensitive and you  don’t want to just be finding out  your gun doesn’t particularly care for an ammo when you really need it to go boom. Check with others (friends or online forums) who have your type of gun, and see what ammo works for them. Then test it yourself, in your actual gun. Some people won’t carry a particular ammunition until they have run a couple of hundred rounds of that ammunition through their gun. Personally, I’ll run a box or two through the gun and consider that sufficient;  you’ll know after that if your gun generally handles  that ammunition with any problems.

So, once you have an idea of what ammunition will work in your particular gun, how do you choose between brands? As I’ve previously discussed, you can’t necessarily trust manufacturer hype. So, how to judge?

Well, you can do some research online. The fellows at The Box of Truth have done a lot of informal testing of ammunition to see how different rounds penetrate and perform. The Brass Fetcher has done a lot of more formal testing using ballistic gelatin. Ballistics By The Inch (which is yours truly’s site) has a lot of data showing velocity for different ammunition. And most gun forums will have anecdotal testing done by members, which can provide a lot of insight.

But don’t over-think this. Handguns are handguns. Yeah, some are more powerful than others, but all are compromises – hitting your target is the single most important thing. And like I said, ammunition can help, but only to a certain extent. We’re talking marginal benefits, at best, whatever the manufacturers claim. So relax;  all of the big name brands are probably adequate, and you’d be hard pressed to make a truly bad decision, so long as the ammunition will function reliably in your gun and you can hit your target with it.

Of course, as you do more research, and get more experience, you’ll probably find you like some ammunition more than others, for whatever reason. That’s fine. It just means that you’re ready to join in the (generally genial) arguments over such matters with other firearms owners. Welcome to the club.

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Some additional thoughts, six years later …

Bullet design has continued to improve, with new and occasionally odd-looking designs and materials being introduced regularly. Some of these are *really* interesting, but I keep coming back to the basic truth that the most important factor is hitting the target. No super-corkscrew-unobtanium bullet designed to penetrate all known barriers but still stop inside a bad guy is worth a damn if you miss hitting your target.

And that means practice (and training, if appropriate) is more important than hardware. What I, and a lot of shooters concerned about their self-defense skill, will do is to use practice ammo for training when they go to the range, to keep their basic skill set honed. And then supplement that with a magazine or two (or a cylinder or two) of their carry ammo, so they refresh their knowledge of how it feels and behaves in their gun. This can help keep practice costs down (since good SD ammo can be expensive), but also keeps carry ammo fresh.

Jim Downey

March 18, 2017 Posted by | .22, .25 ACP, .44 Magnum, .45 ACP, Data, Discussion. | , , , , , , , , , , , , , , , , , , , , , , | 2 Comments

Join the party.

All along, we’ve said that if someone wanted to take the time, trouble, and expense to do some additional research along the lines of our protocols, that we’d be happy to include their data on our site. This is particularly true if it helped expand the selection of “real world guns” associated with the data for a given caliber/cartridge. Well, for the first time someone has expressed an interest in doing just that, prompting us to come up with an outline of what standards we feel are required for making sure it relates to our previous tests.

The biggest problem is that ammo manufacturers may, and do, change the performance of their products from time to time. This is why we have on occasion revisited certain cartridges, doing full formal chop tests in order to check how specific lines of ammo have changed. That gives us a benchmark to compare other ammo after a period of several years have passed, and shows how new tests relate to the old data.

But without going to such an extent, how can we be reasonably sure that new data collected by others using their own firearms is useful in comparison to our published data?

After some discussion, we feel that so long as any new testing includes three or more of the specific types of ammo (same manufacturer, same bullet weight & design) we had tested previously, then that will give enough of a benchmark for fair comparison. (Obviously, in instances where we didn’t test that many different types of ammo in a given cartridge, adjustments would need to be made). With that in mind, here are the protocols we would require in order to include new data on our site (with full credit to the persons conducting the tests, of course):

  1. Full description and images of the test platform (firearm) used in the tests. This must specify the make, model number, barrel length, and condition of the firearm. Ideally, it will also include the age of the firearm.
  2. That a good commercial chronograph be used. Brand isn’t critical — there seems to be sufficient consistency between different models that this isn’t a concern. However, the brand and model should be noted.
  3. Chronographs must be positioned approximately 15 feet in front of the muzzle of the firearm used to test the ammo. This is what we started with in our tests, and have maintained as our standard through all the tests.
  4. That five or six data points be collected for each type of ammo tested. This can be done the way we did it, shooting three shots through two different chronographs, or by shooting six shots through one chronograph.
  5. All data must be documented with images of the raw data sheets. Feel free to use the same template we used in our tests, or come up with your own.
  6. Images of each actual box of ammo used in the test must be provided, which show the brand, caliber/cartridge, and bullet weight. Also including manufacturer’s lot number would be preferred, but isn’t always possible.
  7. A note about weather conditions at the time of the test and approximate elevation of the test site above sea level should be included.

We hope that this will allow others to help contribute to our published data, while still maintaining confidence in the *value* of that data. Please, if you are interested in conducting your own tests, contact us in advance just so we can go over any questions.

 

Jim Downey

September 9, 2016 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, .45 Super, .450 SMC, .460 Rowland, 10mm, 9mm Luger (9x19), 9mm Mak, 9mm Ultra, Anecdotes, Data, Discussion., General Procedures | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

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 | , , , , , , , , , , , , , , , , , , , , , | 1 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

Goodness gracious …

… great balls of fire*:

That’s one of the other BBTI guys shooting a Kel-Tec PMR-30 last weekend.

How was it to shoot?

Actually, pretty nice. Has a surprisingly good trigger. In general, I like Kel-Tec guns for what they are: reasonable quality at a very affordable price. And I downright love my Sub-2000 in 9mm.

But I won’t be getting a PMR-30 anytime soon. Because at the 4.3″ barrel length, it just doesn’t take real advantage of the .22WMR cartridge — you only get about a 20% improvement over a .22lr cartridge.

Unless you like making fireballs.

Jim Downey

*With apologies to Jerry Lee.

November 19, 2014 Posted by | .22, .22WMR, 9mm Luger (9x19), Anecdotes | , , , , , , , , , , , , , , , , , , | Leave a comment

And now for some newer guns.

Last week I posted about some historical reproductions. Now let’s have a quick overview of some newer guns we got to try on the same trip to the range. I’ll include some *very* brief comments, and may return to do longer reviews later when I have some additional time.

First up, the USFA ZiP .22LR, shown with 25-round mag for additional grip purchase:
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Comments: Ugh. I hated this gun. Seriously. It’s awkward to hold, worse to shoot, all sharp angles and weirdly thick. It’s the kind of ugly that isn’t even interesting. The design requires you to put your hand right up close to the muzzle to cycle the action. Since it was brand new, I’ll forgive it having problems cycling properly (this is fairly common with rim-fire guns which are brand new), but I sure as hell wouldn’t want to have to shoot it enough to break it in.

Bottom line: if someone insisted on giving me one of these, I’d just turn around and sell it to use the money for almost any other purpose.

 

Next, the Excel Arms MP-22 .22mag Accelerator:

 

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Comments: Nice gun. Shot very well, and the 8.5″ barrel is sufficiently long to get some benefit out of the .22WMR cartridge.  The heavy bull barrel also does a good job of taming the recoil and muzzle-flip, as can be seen in this vid:

 

Next, the SIG 232 .380acp:

 

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Comments: SIG SAUER’s version of the classic PPK. Just what you’d expect: quality, accurate, easy to shoot for even someone with large hands, as can be seen in this image of my buddy who has even larger hands than I do:

 

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Next, the Glock 42 .380acp:

 

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Comments: I did not expect to like this gun. I was REALLY surprised when I did. Seriously, it is the best-shooting Glock I’ve ever handled. For such a small gun, it fit my large hands comfortably and was easy to shoot well. With Glock quality and reliability, this may be the first .380acp I would seriously consider as a CCW gun.

 

Next, the Kimber Solo Carry 9mm:

 

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And here’s a vid of shooting it:

 

Comments: Kimber quality. Lot of power in a small package, and I felt it in the web between thumb and forefinger of my dominant hand. But that was just a sting, not uncomfortable, even shooting premium SD ammo. Another good candidate for CCW.

 

And here’s a quick look at an old classic: Winchester Model 70 XTR Featherweight in 6.5 Swedish (6.5mm x 55mm)

 

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Comments: Like I said, a classic. And as such, a known quantity. But the first time I’ve shot one in 6.5 Swede, and I was pleasantly surprised by how little recoil there was.

Well, that’s all that I have images of, though we also shot a Chiappa M1-22 and a KelTec PMR-30 .22 mag. Again, both are known quantities and shot as expected. Oh, and my buddy gave my Steyr S9 a go, and you can see that vid here.

As noted, I may revisit any of these with a longer review sometime later, but don’t hold your breath.

 

Jim Downey

 

August 26, 2014 Posted by | .22, .22WMR, .380 ACP, 6.5 Swedish, 9mm Luger (9x19), Anecdotes, Discussion. | , , , , , , , , , , , , , , , , , , , , , , , | 2 Comments

Rimfire Roundtable

Well, it’s too damned cold in most of the country to go out to the range, so if you’d like to see hear why I didn’t stay in radio as a career, and maybe enjoy some good discussion about rimfire cartridges and guns, take a listen to this new podcast:

Episode #26 Rimfire Roundtable #1

On this show I was lucky enough to round up three guys uniquely qualified for the first ever Rimfire Roundtable. We discuss what we would like to see come from the firearms industry regarding rimfire, better supplies of ammunition aside. I hope you enjoy our discussion and let us know your ideas too.

It’s about an hour long, all told, and in spite of my participation fairly interesting/informative. Check it out if you have some listening time!

 

Jim Downey

January 7, 2014 Posted by | .22, .22WMR, Anecdotes, Discussion., Links | , , , , , , , , , , , , , , , , , , , , , , | Leave a 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

.22 Magnum article.

My .22 Magnum article looking at our data and my conclusions is now up over on Guns.com. Here’s an excerpt:

Bottom line

For me, the take-away lesson from these tests is that the .22 Magnum is a cartridge that is best served out of rifle barrel. At the high end we were seeing velocities that were about 50 percent greater than what you’d get out of a similar weight bullet from a .22 LR. In terms of muzzle energy, there’s an even bigger difference: 100 percent or more power in the .22 Magnum over the .22 LR.

But when you compare the two on the low end, out of very short barrels, there’s very little if any difference: about 10 percent more velocity, perhaps 15 percent more power. What you do notice on the low end is a lot more muzzle flash from the .22 Magnum over .22 LR.

While you do see a real drop-off in velocity for the other magnums from very short barrels, they tend to start at a much higher level. Compare the .357 Magnum to the .38 Special, for example, where the velocity difference is 30 to 40 percent out of a 2-inch barrel for similar weight bullets, with a muzzle energy difference approaching 100 percent. Sure, you get a lot of noise and flash out of a .357 snubbie, but you also gain a lot of power over a .38.

Go check out the whole thing!

Jim Downey

June 5, 2013 Posted by | .22, .22WMR, .357 Magnum, .38 Special, Data, Discussion., Links | , , , , , , , , , , | 1 Comment

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

Blimey.

Blimey. Just got the following email:

Someone directed me to this page from your site: http://www.ballisticsbytheinch.com/357mag.html

Now, I appreciate what you are doing, but how you are presenting it is not very helpful.

What a useless page that is. Hey, look, columns of unlabeled numbers! How exciting!

Is that velocity? Muzzle Energy? Momentum? Power factor? Drop over distance? What are the units?

It’s labeled at the top as “.357 Mag Results”. Why not “.357 Mag Muzzle Energy in ft-lbs”?

My response? This: “Sorry to disappoint you. We’ll be happy to completely refund your money.”

The guy wrote back, protesting that he meant it as “constructive criticism.” And then went on to protest that he *still* didn’t know what the data represented (in spite of the fact that it is listed on the Y-axis of every ammo graph and indicated elsewhere on the site).

Sigh. I wrote back the following:

From the homepage of the site, and also referred to in multiple locations elsewhere on the site: “Since we first launched BBTI three years ago, it has become a primary reference tool for firearms enthusiasts of all stripes and from around the globe. Our initial research data covered the relationship between barrel length and velocity for some 13 common handgun calibers/cartridges.”

But you’re absolutely correct, we didn’t spell out that the numbers were velocity in feet-per-second (the standard velocity measurement in the US). We’ll correct that to make it more explicit. The funny thing is that you are the very first person in 3.5 years to not understand that this was what was indicated. Probably because you came at it from someone else’s link direct to that one results page. At least that’s the most charitable conclusion I can come to.

And that, dear friends is why now each caliber/cartridge page now says .22 Results in fps. (or whatever the caliber/cartridge is). Never let it be said that we won’t go the e x t r a inch for the dimwitted and deliberately dense.

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.

Blimey.

Jim Downey

(Cross posted to my personal blog.)

June 26, 2012 Posted by | .22, Data, Discussion., Links | 4 Comments

.22 article is now up.

As most know, one of my sidelines is as a feature writer and reviewer over at Guns.com. I don’t cross-promote all my articles or reviews here, but if you’re interested you can find them under my profile there.

Anyway, there’s a new article up there about our .22 tests and the resultant data. Check it out:

To .22 or not to .22, that is the Question: BBTI’s Killer .22 ‘Defense Rounds’ Test Findings

Jim Downey

December 21, 2011 Posted by | .22, Data, Discussion., Links | , , , , | Leave a comment

The Rimfire Podcast interview.

Just thought I would pass along that I had a nice interview with Ken Kowalski, who does The Rimfire Podcast. If you’re interested, it can be downloaded or listened to streaming here: Episode #11 Ballistics By The Inch Interview with Jim Downey. If you’re on Facebook, pop by and “like” his page.

We had a good discussion, mostly about our .22 tests/data, but also talking about the whole project and firearms in general.

Jim Downey

December 17, 2011 Posted by | .22, Anecdotes, Data, Discussion., Links | Leave a comment

And we’re off!

Well, initial coverage is off to a good start, with a couple of excellent pieces in The Firearm Blog and Guns.com. Guns.com should also be posting a piece by me about what I think you can conclude from the new .22 data sometime soon.

And I got the following private message from someone very well known and highly respected on one of the major forums:

Jim,

I’ve got to say that your site really impresses me. I’m sure that most shooters realize how much of an investment in terms of ammunition money is represented in the website, but as an analyst/engineer, I also understand how much time and effort is required to collect and collate data in such a way as to make it easily accessible and useful.

Great work!!

I’m sure in the coming days the news of the relaunch will propagate around the web, but it is always exciting to see it start.

Quick bookkeeping note: last month we had a total of 336,809 hits to the site, bringing the total as of Dec. 1 to 8,110,033. That translates to 12,900 unique visitors, or 45,443 page views. Compared to one year ago, we had 387,198 hit in November 2010, with 13,335 unique visitors and 51,094 page views. December 2010 still remains our high benchmark, with 459,020 hits, 15,622 visitors and 60,799 page hits. Be interesting to see if we can beat that this month! Help spread the word!

Jim Downey

December 2, 2011 Posted by | .22, Data, Discussion. | 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

8 million hits in the naked city.

Hey everyone –

Long time, no posts. Sorry about that. The summer and fall were filled with a lot of different high-intensity projects. But I have several things to share this morning…

One, we broke 8 million hits to the BBTI website about a week ago. That’s in just under 3 years time. Congrats to one an all, and thanks.

Two, barring unforeseen complications and general catastrophe, *tomorrow* we’ll launch the completely revamped BBTI. It will contain all the data that you know and love, but there will be a lot more. Like:

  • Data on our .22 chop tests this summer – 10 different ammos, and also 20 ‘real world’ .22 guns.
  • Data on our .460 Rowland chop tests last spring – an impressive cartridge!
  • Data on our .223 chop tests this last spring – Yup, it is definitely a rifle cartridge.
  • Data on our HUGE ‘Cylinder Gap’ tests this last spring, involving over 6,000 rounds fired. Some very interesting results.
  • Revised means of navigating the site, to reflect the way people have been using it, in order to make it faster and easier.
  • A comprehensive list of the 99 different ‘real world’ guns we’ve tested so far.
  • A bunch of new graphs and charts and data sets for your inner ballistic geek.
  • Some new links and other goodies.

So, get the champagne on ice, find your party hats – there’s gonna be a celebration tomorrow as we launch this new ship!

Jim Downey

November 30, 2011 Posted by | .22, .223, .460 Rowland, Data, Discussion., General Procedures, Links | , , , | Leave a comment

Promises, promises.

It’s been . . . a long month. Well, no, not this one. The last one. And the one before that, to be honest.

So, while I know that a lot of folks have been eagerly awaiting the new data, let me say . . . just a little longer. Really. My Good Lady Wife, who takes care of the website, has had her hands full with a couple of other projects (including a big one of mine).

The good news is that she tells me that the new website tools she’s learned to use will help make BBTI better than ever. We’ve talked about the website redesign, and I think everyone will be pleased with the new look, the new functionality, and the new data (including .22 and .223 as well as the massive .38/.357 Gap Tests). So hang on – we’ll get it all up as soon as possible.

A quick report on site numbers, while we’re at it: August we had 290,998 hits, bringing us to a grand total of 7,155,801 hits.

For the quickest notification when the redesigned site goes ‘live’ with all the new data, subscribe to this blog, follow us on Facebook or Twitter.

Jim Downey

September 1, 2011 Posted by | .22, .357 Magnum, .38 Special, Data, Discussion., Links | 1 Comment

Happy Father’s Day.

I think they did a good job with the photos they chose to go with my text:

One of my earliest memories is of shooting with my dad. I was about five or six. We were out at a relative’s place in the country. Plinkin’ cans with .22s. Then my dad let me shoot his service revolver for the first time, helping me hold up the Smith & Wesson Model 10 he had been issued by his department. Yeah, he was a cop.

Happy Father’s Day, everyone.

Jim Downey

(Cross posted to the my personal blog.)

June 19, 2011 Posted by | .22, .38 Special, Anecdotes | 1 Comment