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The Range
Rifle & Shotgun Discussion
DPMS AR-10 problem
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<blockquote data-quote="D V US" data-source="post: 2831167" data-attributes="member: 34558"><p>I have a gen 1 DPMS .308 SASS that has developed an issue. I was running through a mag of 168gr. BTHPs and the first 10 rounds cycled normally, but then it started to fail to feed. I assumed it was a fluke but the next three shots got worse before checked my brass. Wow was I lucky. The first seven cases were fine, 8 & 9 started showing head swiping from the ejector, 10 showed swiping and a slight burn on the case head and 11 had a larger burn on the case head. 12 - 14 had the primers completely ejected and heavy scarring on the case head. No primers in the other cases showed any overpressure signs.[ATTACH]52806[/ATTACH][ATTACH]52807[/ATTACH][ATTACH]52808[/ATTACH][ATTACH]52809[/ATTACH]</p><p>The specifics:</p><p>DPMS SASS .308 18" barrel Gen 1</p><p>Approx total round count ~250</p><p>Load data</p><p>168gr. Hornady BTHP</p><p>42.2 gr. H4895 (midrange load)</p><p>Winchester primer</p><p>various cases</p><p>All charges were individually weighed and loaded with an o.a.l. length of 2.800, full length resized and loaded with Hornady dies.</p><p>Rounds were fired slow fire, about 1 minute between shots and five minutes between 5 shot groups. Temperatures around 45 degrees.</p><p></p><p>Any help in identifying this problem would be appreciated.</p></blockquote><p></p>
[QUOTE="D V US, post: 2831167, member: 34558"] I have a gen 1 DPMS .308 SASS that has developed an issue. I was running through a mag of 168gr. BTHPs and the first 10 rounds cycled normally, but then it started to fail to feed. I assumed it was a fluke but the next three shots got worse before checked my brass. Wow was I lucky. The first seven cases were fine, 8 & 9 started showing head swiping from the ejector, 10 showed swiping and a slight burn on the case head and 11 had a larger burn on the case head. 12 - 14 had the primers completely ejected and heavy scarring on the case head. No primers in the other cases showed any overpressure signs.[ATTACH=CONFIG]52806[/ATTACH][ATTACH=CONFIG]52807[/ATTACH][ATTACH=CONFIG]52808[/ATTACH][ATTACH=CONFIG]52809[/ATTACH] The specifics: DPMS SASS .308 18" barrel Gen 1 Approx total round count ~250 Load data 168gr. Hornady BTHP 42.2 gr. H4895 (midrange load) Winchester primer various cases All charges were individually weighed and loaded with an o.a.l. length of 2.800, full length resized and loaded with Hornady dies. Rounds were fired slow fire, about 1 minute between shots and five minutes between 5 shot groups. Temperatures around 45 degrees. Any help in identifying this problem would be appreciated. [/QUOTE]
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