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1/25/2018 7:38:29 AM
Posted: 7/19/2003 6:59:18 AM EST
Referencing the 7.62 West German FMJ that fragmented so well in the DR Fackler tests (as shown in the 5.56 FAQ article), does anyone know how fast it was going when it fragmented? Since impact velocity is so important for the 5.56 to perform and the effect that short barrels/distance have on its terminal performance, it seems this is a vital piece of data missing.
Link Posted: 7/20/2003 12:46:27 AM EST
I'm not sure what velocity threshold is needed to allow this round to fragment, but I bet Troy will have the answer when he comes across this post. So I am replying to bump it back up to the top before it falls off the front page. -Charging Handle
Link Posted: 7/20/2003 10:26:52 AM EST
[Last Edit: 7/20/2003 10:29:32 AM EST by Troy]
Link Posted: 7/29/2003 11:47:38 AM EST
I found the original article by Dr. Fackler the photos came from, in it he states that the bullet was fired at 3 meters. Additionaly, he quotes West German sources that the fragmentation occurred at 100 meters. Assuming standard 7.62 performance that should work out to 2800-2600 fps. The subject probably isn't completely moot scince I believe the Bundeswehr (sp?) still uses lots of 7.62 in their support machine guns if not their service rifles. Maybe they changed the bullets?
Link Posted: 7/29/2003 7:15:49 PM EST
[Last Edit: 7/29/2003 7:25:00 PM EST by Bollocks]
Gutentag Freunden, The DAG 7,62 NATO with 9,45g (147 grain) Ironjacket travels with 855 m/s at the muzzle. The Ironjacket is 0.6mm thick and breaks intentionally at the cannelure. This is the headstamp: [img]http://www.waffeninfo.net/munition/308win_11.jpg[/img] Grüssen Böllöcks
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