So, according to Greg’s study, about a third of the people shot with a .25 or a .22 did not immediately change their behavior. With the ballistically similar .22, that number was 31%. . For the LARGER 25 acp vs 22LR handguns, I'd go with 22LR just for less expensive ammo = more practice. I assume it's "standard" .22 LR thread pitch. Since the very beginning of the series on pocket pistols that we started running on the Lounge (as well as YouTube) in late 2018, I have promising to add some of the smaller handgun calibers to our ballistic gelatin test project. out of a barrel longer than two inches! 9mm is a big step up in performance. Ballistically, the .22 is faster out of longer barrels. Now, compare that to the larger calibers: .380 ACP, .38 Special, 9mm, .40 S&W, and .45 ACP all had between 13-17% failures to incapacitate. Just my opinion. It's called the "Covert". The .25 ACP is a bit more reliable than .22 rimfire. Should be available in the next couple months I guess. what? Shortcuts.22 LR.22 Magnum.25 ACP.32 ACP; 9mm Makarov.380 ACP.32 S&W Long.32 H&R Magnum.327 Federal Magnum; Project Overview. 1/2 x 28 is the standard, rarely now 1/2 x 36 The 32 does 2.66 times that, the 380 around 2.9x and 9mm around 6.6x that. As we leave it, the 25 ACP is still an inch short of meeting the FBI’s minimum requirement of 12 inches of penetration. the .22 is more powerful than a .25 acp. The 25 ACP is made for tiny pistols. the .25 acp has a relatively large primer that burns all power in a short two inch barrel! But in short 2" - 3" pocket pistol barrels they are about equal. Today, we are happy to … yes! While individual bullets are obviously inferior to 32ACP, 25ACP does give noticeably greater capacity for the same grip length. Besides better performance vs. 22LR, 25ACP also gives fractionally greater capacity. Whatever that is. The Colts, Brownings, Berettas, S&Ws, etc. The use of the .25 ACP allows for a very compact lightweight gun, but the cartridge is relatively short ranged and low powered, putting it in the same class as the .22 LR rimfire … you think you are smarter than john moses browning? But much better than .25 acp and .22Lr. were just about all there was available - and being chambered for the little .22 and .25 kept the size small - as was desired. 22 LR 40gr FMJ vs 25 ACP 50gr FMJ in 20% Ballistic Gelatin Calibers: 380 ACP . I think the military did tests and found that a gun that can penetrate 3/4" board is lethal. If the .25 acp just won't work out I'll get one of the Beretta Bobcat .22's that come threaded from the factory. The only real advantage to the .25 ACP is center fire ignition versus rimfire. this is where the .25 ACP comes into it's own. The 22 LR isn’t. Re: .25 ACP ballistics test Until the little bitty locked-breech DAOs like the KelTec and Ruger LCP came along, the .25acp autos filled a niche for a vest pocket repeater. i have short barreled automatics in both .22 and .25. 25 acp is better sealed, and hence 'ages well' but honestly for the price of 25 acp ammo you can afford to put new 22LR ammo in monthly and STILL come out ahead. The .25 ACP is reloadable, the .22 rimfire isn't. As for a pocket gun, I'd recommend a .32 ACP over the .25, but I'd take the .25 over the .22 rimfire. Sadly, in short barrels both .22 LR and .25 ACP hollow point ammunition doesn't travel fast enough to provide both sufficient penetration and expansion. When you encounter bones, the soft lead of the .22 LR inhibits penetration even further. Taurus 25PLY holds 9 rounds in the magazine to the 8 held by the rimfire model. the .22 has weak rimfire ignition that takes a while to burn all the power! 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