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Thread: Stuck cases, popped primers, and a ruined bolt.

  1. #1
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    Stuck cases, popped primers, and a ruined bolt.

    I was out shooting my rifle with some silver bear, ultramax and hornady tap ammo. Shot the silver bear first then the hornady. The siver bear worked perfectly, the hornady kept popping primers, and once I started shooting the ultramax through the gun I got stuck cases.

    On the last round that was stuck I tried to mortar the rifle, but could not get the case out, the bolt was also stuck in the chamber. I pounded it out and the empty case showed the primer was gone, the rim of round is bulged out like it exploded towards the extractor and the extractor itself had been bent from the round going off. Also on the back of the round where the bolt would make contact there is a piece of brass fused to the rim.

    I understand the cases likely got stuck from shooting steel cased ammo before the brass, but why the popped primers and the bent extractor? I can send pics to anyone that is interested, but suck with computers and don't know how to post pics.
    The rifle specs are as follows:

    noveske recon barrel
    fail zero bolt
    daniel defense carrier
    vltor mur upper
    buffer is a spikes

    This rifle has been giving me popped primers every time I shoot brass cased ammo through it cheaper ammo works just fine???

    Also if the bolt is still intact aside from the extractor is it safe to just keep the bolt and replace the extractor? All input is appreciated.
    Last edited by greene; 09-13-10 at 18:57.

  2. #2
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    Quote Originally Posted by greene View Post
    This rifle has been giving me popped primers every time I shoot...
    STOP SHOOTING IT.

    Quote Originally Posted by greene View Post
    the rim of round is bulged out like it exploded towards the extractor and the extractor itself had been bent from the round going off. Also on the back of the round where the bolt would make contact there is a piece of brass fused to the rim.
    What you had was a KB that was just weak enough to not destroy the entire upper.

  3. #3
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    Any way to fix this? Can I just replace the barrel and BCG or is the whole upper trashed? Thanks.

  4. #4
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    I've only seen the barrel damaged by a more energetic KB, the barrel extension was cracked when the extractor was forced outwards.

    The Bolt is probably going to have a shortened life if it's still intact.

    You should get it looked at by a pro, I recommend you sent it to me unless you have a very good AR gunsmith handy.

  5. #5
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    Can you PM me an address to send it to? I can send it out tomorrow.

  6. #6
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    In addition I would make sure that you have the info handy from the ammo (lot numbers and casings). It is entirely possible that you have some bad ammo. Wait and see what Todd says.
    Last edited by Iraqgunz; 09-13-10 at 22:01.



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  7. #7
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    I am no professional, but it really sounds like a professional needs to take a look at this gun.... The popped primers and out of battery kaboom is not a good thing at all... I am suprised because it seems you have a good setup. Something is out of spec.

  8. #8
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    looking at it again, I bet 10 bucks it has something to do with the DD carrier and the fail zero bolt.... I would never mis match a bolt.

  9. #9
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    I doubt it was a bolt issue. The rifle has several thousand rounds through it with no problems, it's just with brass ammo.
    Last week when I was out shooting it was hornady 75 grain match and I got 4 popped primers out of 60 rounds. Loaded up some silver bear and it ran like a top. Maybe a tight chamber, but I'm no expert.

  10. #10
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    Quote Originally Posted by Todd.K View Post
    What you had was a KB that was just weak enough to not destroy the entire upper.
    Agreed.

    Quote Originally Posted by evolixsurf View Post
    looking at it again, I bet 10 bucks it has something to do with the DD carrier and the fail zero bolt.... I would never mis match a bolt.
    High confidence that it's not the problem.
    2012 National Zumba Endurance Champion
    الدهون القاع الفتيات لك جعل العالم هزاز جولة الذهاب

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