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Posted: 12/11/2003 9:29:39 PM EDT
I've read that, to compliment the new XM-8 rifle being developed to replace the M16/M4, a polymer-cased 5.56mm round is being developed. It is supposed to operate at the same pressures at conventional brass-cased rounds, and give the same velocity, but be much lighter to carry. Anyone have more info on these? I'm curious how a polymer casing could withstand 55,000+ psi pressures in a rifle case. Any word if the 6.8mm round will also use this?
Link Posted: 12/12/2003 8:28:33 AM EDT
Good grief I have never even imagined using polymer as a cartridge case... Humm interesting to be sure. IPSC_GUY sends
Link Posted: 12/12/2003 12:29:53 PM EDT
I may not be up to date on the latest technology, but I can't see a polymer that would hold up to those pressures and temperatures.
Link Posted: 12/12/2003 5:40:17 PM EDT
sounds neat so i googled it and found this pdf www.dtic.mil/ndia/2002infantry/husseini.pdf 3.86megs also a couple of hits that mention this possibly in use with the XM8. being developed by a company called NATEC formerly AMTECH. got more hits searching for AMTECH polymer cased ammuntion than i did natec. still looking though, pretty interesting.
Link Posted: 12/12/2003 9:02:33 PM EDT
[Last Edit: 12/12/2003 9:03:15 PM EDT by Wingman26]
sounds neat so i googled it and found
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I hope you didn't google it in public! [peep] [:)]
Link Posted: 12/13/2003 10:28:40 AM EDT
well if nobody was around is it still considered out in public? [:D] anyway, its claimed that this stuff keeps the chamber cooler and gives same velocity with less powder. i would like to now just how much cheaper it is. i could go for $100 a case M855 oh well its not like us civies will ever get any of this. evil plastic ammo gets past metal detectors or some such crap..
Link Posted: 12/14/2003 2:52:26 PM EDT
I didn't check the pdf you found but,FWIW, I picked up a dummy round of polymer cased ammo at a law enforcement trade show back in 1991. Headstamp is AMTECH at the 12 and 223 at the 6 position. The bottom 3/8" of the case is brass and the rest is white polymer. Manufacturer's rep. at that time said it was coming out soon.
Link Posted: 12/14/2003 3:18:19 PM EDT
I'm betting that it is not reloadable.
Link Posted: 12/15/2003 5:25:31 AM EDT
Originally Posted By grimes: I didn't check the pdf you found but,FWIW, I picked up a dummy round of polymer cased ammo at a law enforcement trade show back in 1991. Headstamp is AMTECH at the 12 and 223 at the 6 position. The bottom 3/8" of the case is brass and the rest is white polymer. Manufacturer's rep. at that time said it was coming out soon.
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During AMTECH's brief commercial run of polymer cased .38 Special ammo, their reps handed out polymer cased dummies of 5.56x45mm, 7.62x51mm, and 12.7x99mm (.50 BMG).
Link Posted: 12/15/2003 8:25:35 AM EDT
Originally Posted By grimes: I didn't check the pdf you found but,FWIW, I picked up a dummy round of polymer cased ammo at a law enforcement trade show back in 1991. Headstamp is AMTECH at the 12 and 223 at the 6 position. The bottom 3/8" of the case is brass and the rest is white polymer. Manufacturer's rep. at that time said it was coming out soon.
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I remember they ran ad's in the magazines at the time. I'm wondering what the holdup has been.
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