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1/25/2018 7:38:29 AM
Posted: 10/14/2003 6:05:49 PM EST
Does anyone know how the new 5.7 round compares to the old 7.62x25 in penetration ability? I keep hearing all sorts of stories about how wonderful the 5.7 is but I also have heard the old 7.62 was king of the handgun world for punching through stuff.

PS, I think I have the 5.7x28 designation right, I mean the new Five seveN round.
Link Posted: 10/15/2003 12:01:42 PM EST
Link Posted: 10/15/2003 4:11:51 PM EST

Originally Posted By Troy:
The 5.7mm round has had several notable failures to stop in domestic police use, from both the P90 and the Five-seveN pistol. We can easily predict (and experience bears out) that the P90's ability to spray 5-10 round bursts into someone means that the gun can be effective even though individual rounds are less so. But the Five-seveN is a semi-auto pistol, and also has a shorter barrel, further reducing velocity. It has BIG problems as a defensive gun, and there are several lawsuits from individual officers who had been issued Five-seveN's as duty weapons regarding these failures to stop.

Damn, don't they play Counter-Strike? Don't they know all they need to do is get a headshot from 40 yards away?!?!?!

Yes, yes, I jest..
Link Posted: 10/15/2003 4:48:51 PM EST
Link Posted: 10/15/2003 7:35:23 PM EST

Originally Posted By Troy:

But that's not the whole story. The 5.7mm round makes wounds in flesh that are in .22LR/.22Mag class. Penetration is FAR too shallow, and tissue damage is relatively minor. 7.62x25mm is better, but still less than a 9mm FMJ, unless you use a (fairly rare) hollowpoint, which will likely not meet the penetration goal of at least 12".

Too shallow?? I've always thought the problem with 7.62x25 was it's excessive penetration in flesh. I seem to recall reading somewhere's that 7.62x25 fmj will penetrate some 60+" of ballistic gel, with only an icepick type wound channel.

Re 7.62x25 vs 5.7x28: I'll take the 7.62x25 anyday. The 5.7 is only chamberd in the P90 burpgun & the Five-seveN pistol...neither of which are readily available to civies & are rather fugly. 7.62x25 Tokarev/7.63 Mauser chambered guns & ammo are much easier to find.
Link Posted: 10/15/2003 10:42:46 PM EST
Link Posted: 10/16/2003 3:18:31 PM EST
Thanks for the info guys. It is about what I figured it would be. I got to handle a Five seveN and the round didn't impress me that much.
I have done some playing around with the 7.62x25 and have been quite impressed. Over 1600fps using the Hornady 95gr XTP (Troy, is the the HP you commented in?).
Thanks again!...
Link Posted: 10/16/2003 4:06:27 PM EST
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