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The Range
Rifle & Shotgun Discussion
Problem with new AR build
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<blockquote data-quote="swampratt" data-source="post: 3265669" data-attributes="member: 15054"><p>Buddies Ar was doing that and we did the same as you did and no dice.</p><p>I built the same gun as his in fact I built 2 of them with the same parts and No issues.</p><p>I finally figured out the issue.</p><p></p><p>The shoulder Ogive on the brass was not set back far enough. Yes handloads.</p><p>My gun and the wife's gun run just fine never miss a lick.</p><p>Look really close at how far the bolt is going in .</p><p>Yes forward assist did not help even pounding it.</p><p>I ended up making cases for his chamber that have the shoulder set back .004" more than what my guns like.</p><p></p><p>Now I do have a bobbed hammer on mine and I also bent one leg on the hammer spring to remove a lot of tension and the other leg is tweaked some also that is my gun. and no light strikes ever I use hard cup primers CCI 450.</p><p></p><p>When I measured the firing pins on his vs mine his actually stuck out .003" more than mine.</p><p>So it was not the firing pin.</p><p>It was just case shoulder was bottoming out in the chamber before the bolt fully closed.</p><p></p><p>Know what sucks is a huge 10 point in front of you as you are laying on your belly in knee deep wet grass and the gun goes CLICK!.</p><p>Happened just like that and he chambered another and CLICK and another CLICK and then pounding and rechamber and deer decided to bolt.</p><p></p><p>SUCKKKKKK!</p></blockquote><p></p>
[QUOTE="swampratt, post: 3265669, member: 15054"] Buddies Ar was doing that and we did the same as you did and no dice. I built the same gun as his in fact I built 2 of them with the same parts and No issues. I finally figured out the issue. The shoulder Ogive on the brass was not set back far enough. Yes handloads. My gun and the wife's gun run just fine never miss a lick. Look really close at how far the bolt is going in . Yes forward assist did not help even pounding it. I ended up making cases for his chamber that have the shoulder set back .004" more than what my guns like. Now I do have a bobbed hammer on mine and I also bent one leg on the hammer spring to remove a lot of tension and the other leg is tweaked some also that is my gun. and no light strikes ever I use hard cup primers CCI 450. When I measured the firing pins on his vs mine his actually stuck out .003" more than mine. So it was not the firing pin. It was just case shoulder was bottoming out in the chamber before the bolt fully closed. Know what sucks is a huge 10 point in front of you as you are laying on your belly in knee deep wet grass and the gun goes CLICK!. Happened just like that and he chambered another and CLICK and another CLICK and then pounding and rechamber and deer decided to bolt. SUCKKKKKK! [/QUOTE]
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Problem with new AR build
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