9mm +P and +P+ compared to .357 mag snub

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This subject was pretty much old news and had been discussed back and forth even back in the 80's, when revolvers were still commonly seen in LE circles and a short-barreled 6-shot .357 Magnum made by S&W, Colt or Ruger wasn't an uncommon thing for off-duty cops to carry.

The .357 Magnum started to lose it's velocity advantage once you started to reduce the barrel length under 4", and even more under 3". (Nobody measures revolver barrel length as including the cylinder charge hole length. It isn't relevant since the barrel/cylinder gap allows loss of pressure.)

Another influence was the difference in bullet designs between revolvers and pistols back then. Although there were some isolated examples where pistol bullets had exposed lead outside the nose cavity, for the most part the nose cavities ran jacketing up to the top edge of the cavity to try and enhance feeding, which wasn't necessary for revolvers. Heavy jackets on pistol bullets would often delay and interfere with deformation and expansion, while bullet designs used for revolver cartridges could have some exposed lead (the Rem SJHP is an excellent example) which would help by rolling over more easily and even breaking off & fragmenting (which isn't always a bad thing, depending on the circumstances).

In more recent times we've seen some of the improvement and refinement of defensive bullet design carried over into revolver cartridges which are still popular. (How much of this is the result of applying the lessons learned in making hunting ammunition for handgun hunters is always an interesting discussion, too. ;) )

While I don't find the subject of trying to promote 9mm over .357 Magnum to be all that interesting nowadays (or compare the +P/+P+ 9mm to the .357SIG, for that matter), the increasing popularity of the diminutive 5-shot .357 Magnum wheelguns has seemingly created the potential for the revival of this sort of debate ... for some folks, anyway.

I've become more interested in what any particular shooter is able to actually do when shooting any of the often contested guns, calibers & ammunition. If someone can't consistently use it to good effect, making rapid & consistently accurate hits on intended targets under anything less than 'ideal range conditions', does it really matter what paper ballistics and cracker barrel discussions churn out? Really?

I'd much rather have a seasoned & experienced partner armed with a well-used & well-maintained S&W M10, loaded with standard pressure 158gr LSWC, into Harm's Way having to enter that dark doorway, over anything being promoted in the way of cutting-edge, high-tech, flavor-of-the-month wondergun & ammunition, in the hands of some earnest but inexperienced & untried paper puncher sporting the latest in black nylon & velcro tac-apparel ...

Just my thoughts, though.

It's only a handgun.
 
"Bullet placement is king, penetration is queen, everything else is angels dancing on the head of a pin."
Not my quote, but it seems apt here.
 
I've said before that I handloaded 9mm as potent as 357 mag ammo. I have no doubt some did not believe that but I didn't catch any flak for the comment (I get ignored a lot ).

It requires a strong gun so I won't mention specifics but according to the book I used it beats your numbers. I believe those factory ammo liability lawyers never sleep.

You may have loaded some very hot (out of specs...+P+ is not an official rating) 9mm ammo capable to generate the same muzzle energy of the typical wimpy, underloaded 357 Mag from Remchesteral.

If you load the 2 cartridges at full specs (even conceding the +P for the 9mm) there is no way in the world that a 9mm can match the performance of a 357 Mag.

A full house SAAMI compliant 357 Magnum can launch a 158 gr. pill developing ~700 lb out of a 8 3/8" barrel.....try to match that with an in spec 9mm load.

Yes you can hot rod a 9mm....but you can hot rod a 357 Magnum too....I heard of people pulling 900+ ft/lb out of Rugers....;)
 
You may have loaded some very hot (out of specs...+P+ is not an official rating) 9mm ammo capable to generate the same muzzle energy of the typical wimpy, underloaded 357 Mag from Remchesteral.

If you load the 2 cartridges at full specs (even conceding the +P for the 9mm) there is no way in the world that a 9mm can match the performance of a 357 Mag.

A full house SAAMI compliant 357 Magnum can launch a 158 gr. pill developing ~700 lb out of a 8 3/8" barrel.....try to match that with an in spec 9mm load.

Yes you can hot rod a 9mm....but you can hot rod a 357 Magnum too....I heard of people pulling 900+ ft/lb out of Rugers....;)

And loading it to 353 Casull level = best defense round then?

Who goes after people with 357 mag loaded to max pressures?
 
Handicap a .357 with weak for cartridge loads and a barrel that is to short to get the job done. Then load the 9mm with beyond SAAMI spec (+P+) ammo and we get comparable results.

Kind of like taking half of the spark plugs out of a '70 Camero SS, then dropping a Big Block Mopar into your '85 Corolla and claiming that a Corolla is just as fast as that '70 Camero.
 
CTShooter
Quote: "If you shoot your 9 well then that's great, if you shoot your 357 Magnum well then that's great, if you shoot you 45 well then that's great also. As long as you shoot your pistol well then that's all that should matter. Muzzle velocities should not be the way to choose or defend your choice in caliber and pistol. It is not king...shot placement is."

.................................................................
Well said.

I do a lot of chronograph testing, but that's just because I enjoy doing that kind of stuff. (Experimental testing is what I did for a living, or 30+years) I like comparing all of my guns, both rifle and carry guns, against one another, just to satisfy my own curiosity. I've posted a few of my results at some gun forums, just in case any one was interested. Knowing as much as possible about your hobby is always a good thing, and ballistic performance (both kinetic energy and expansion and penetration) is just another piece of knowledge, and it can't be dismissed as being meaningless. But, I agree with CTShooter's general assessment of the calibers & how they're used - if hit your target, all are effective. I have a piles of testing data, and it's fun to talk about when the subject comes up, but I do not use it to determine which gun I'll be carrying for SD. Carry what you have, hit what you're aiming at, and stop worrying about which can post the biggest ballistic numbers. In a SD scenario, all are likely to solve your problem.
 
CDW4ME,

As a follow up to my previous post - as I said, I agree with CTShooter on a few of his points. That ballistic numbers should not be the deciding factor in your SD gun choice, and that shooting well is the most important thing, no matter the caliber. He stated that very well, and like him I don't believe it really matters what you carry, as long as you know how to use it. But I strongly disagree with the assessment by several members that you are "making the rounds" or "fishing" at the gun forums. There's nothing wrong with visiting several forums, and I think you have just as much reason to do that as anyone else here. And unlike most people who like talking ballistics numbers on the forums, you've done more than quote ammo manufacturer propaganda. You've done the grunt work of testing for yourself.

Like you, I've also taken the time to run a comparison between 9mm+P and .357 Magnum (from snubbies), and my results have proven to be very similar to yours. I never intended for it to be a test that would pass as being everyone's idea of "fair" ( ie - 4" revolver vs 4" semi auto). My reason for running the tests were to compare the ballistic performance between MY carry guns (snubbies, and compact to mid-sized 9mm semi autos), and when I posted some of the results on another forum, it didn't take long for someone jump on my results as being "meaningless", even though I had clearly stated that the test was run to satisfy my own curiosity about my own carry guns. Apparently there are a lot of people that some how have their own identity tied in with the caliber of gun they carry?


Rather than listing a lot of test results as you did CDW4ME, I'm going to just pick two guns that I find to be comparable for concealed carry, based on my own experience.

A Ruger SP101 and a CZ -PCR 9mm. No, there barrel lengths are not the same (2 1/4" vs 3.9"), but their weight is within a few oz of one another, their over length is within a few 1/10ths of an inch, and I've found that they carry with equal ease (or difficulty, depending on ones point of view). And rather than listing the results from all the brands and type of ammo I've tested in those guns, I'll list only one brand of ammo, and the same type from that manufacturer. I think that's about as fair as you can hope to be in a comparison. Both guns were tested on the same day under the same atmospheric conditions.

CZ 75 D Compact PCR 9mm
Cor Bon DPX 9mm+P 115gr - 1227fps - 384 ft/lbs

Ruger SP101 .357 Magnum
Cor Bon DPX .357 Magnum 125gr - 1182 fps - 388 ft/lbs

Objectively, equal performance from a type of ammo (DPX) that I've found to be a good performer in all calibers & guns I've tested. Again, I do not suggest that ballistic testing alone should be the determining factor in picking a carry gun, and I don't think that CDW4ME is suggesting that either. All of the SD calibers are so effective, it doesn't matter what you carry, as long as you know how to use it. But his results are objective fact and not subjective opinion. He shouldn't be slammed for posting objective test data. Some people here have done their own testing, but most have not. Those that don't agree with his methods should take the time out of their busy schedules, pull out their test equipment, get out there in the blazing hot sun for an entire day, hunkered down over their chronographs, guns and lap tops,....... and run their own ballistic tests, and then post their results for all of us to see. That way, rather than contributing only criticism and subjective opinion, they could contribute some actual facts.

CDW4ME, Thank you for showing us your test results. Knowledge is a good thing ;)
 
brabham78 Thanks for your reply.

At one time I considered a Ruger SP101 for carry, but when I compared the weight and capacity and speed of follow up shots to something like a Glock 26/27 it was no contest.

I think wheelguns are popular with some since they eliminate feeding and ejection concerns, plus you can use various style bullets SWC ect...
They (wheelguns) offer simplicity.

However, once I've run "enough" ;) of a certain load through a Glock (or XD) without a problem I'm not worried about it's reliability.

I don't select my carry gun based on whether it produces the most KE or launches the biggest bullet (use to). Rather I'm after a blend of power, concealibility, capacity, and speed of follow up shots.

My favorite carry pistol has always been a Glock 27. This gets carried the most due to it's size. It is typically carried "appendix" IWB and is concealable under a t-shirt.

If I increase the level of concealment difficulty to strong side IWB the choices have varied from XD45 compact, Glock 38, Glock 32, Glock 23 depending on "mood":rolleyes:.

I was never really much on the 9mm and my poor Glock 19 was ignored. I never shot it for years (seriously). Only after getting a shot timer did I (within the last 10 years) shoot the 19. I knew (without the timer) I shot it (19) quicker than the 40, but I'd carry the 40 anyway, since it had a bigger bullet.

Well, the time difference is nearly insignificant, but when I actually shot them one after the other (something I had not done in years) I came to appreciate the 19. Although the 2nd shot time was insignificantly quicker, my preception of how easy it was to deliver that shot accurately was different; the 40 (23) took more work / focus to keep the front sight on target. My XD45 compact seemed to take less effort to shoot than the model 23, even though their 2nd shot times were identical.

For strong side IWB I'm now going to carry the 19 instead of the 23, not due to a few hundredths of a second quicker shot time, rather because it seemed easier to deliver those shots than the slight time difference would imply. If I want to increase weight & thickness I'll "step up" to the XD45 compact.

Back to the point of the thread. Many people don't have a chronograph and are not detail oriented anyway. I simply want to show that the 9mm in +P and +P+ loadings is basically equal to the .357 if fired from a snub using "typical" ammunition in the snub.

I think (opinion, but likely correct) that the "typical" owner of a 9mm is more likely to shoot hot ammo than the typical snub revolver shooter. Not many (more opinion) people that buy a SP101 or J frame are going to stuff it with 180 Buffalo Bore.

I don't know why I felt the need to post all of this.
Maybe in other threads I'd seen folks shun the 9mm while on the other hand feeling protected by a .357? Dang, the bullet diameter is the same. If we get the speed about the same then they will perform about the same.

Oh well, I tried.

I don't really ahve a point to prove :rolleyes:. My Glock 27 loaded with ten 165 gr. 40 S&W bullets is "better" than any .357 anyway. :neener:
 
"With some loads the 9mm can match the .357 Magnum..."
Yes, that is absolutely true. However, the 1st Magnum can go where the 9mm simply can't.
http://www.lasc.us/FryxellLyman358627.htm
Buffalo Bore and Double Tap ammo can offer impressive velocities from a short barrel, but the muzzle flash and recoil can be severe. A 215gr Lyman #358627 SWC can reach nearly 900 fps from a snubby barrel. This is approx. equal to a standard load .45 ACP from a full size M1911 with the smaller diameter bullet having better penetration. This load doesn't have the muzzle blast of the Buffalo Bore and Double Tap loads either.
 
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