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Thread: Round "cooking off" in the magazine?

  1. #11
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    Quote Originally Posted by Rifleman_04 View Post
    It didn’t.


    The AR can not fire out of battery.
    Thanks for squashing that. I hate that myth.

    Sounds like a small kaboom... that could easily appear to be a mag cook off to an RO. They don't get that job for being the sharpest tool in the shed.
    "What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v

  2. #12
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    Did the shooter and RO find the round fired just before the alleged cook off? Probably just a typical blown case.

    As for an OOB firing, isn't it impossible for the firing pin to protrude far enough to reach the primer until the bolt is locked?

  3. #13
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    Quote Originally Posted by cctroupe11 View Post
    If the bolt is out of spec or the headspace is improperly set, an OOB detonation is completely possible resulting in a case head separation, blowing out the magazine and (sometimes) destroying the upper reciever. I have seen it happen.
    The firing pin doesn't protrude enough from the bolt face until the bolt locks into battery to ignite a primer.

  4. #14
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    Quote Originally Posted by cctroupe11 View Post
    If the bolt is out of spec or the headspace is improperly set, an OOB detonation is completely possible resulting in a case head separation, blowing out the magazine and (sometimes) destroying the upper reciever. I have seen it happen.
    No. Not with the AR/M16 FoW. Not possible.

    What you sawr was a ruptured case head. Happens a lot with worn brass and crappy reloads.

  5. #15
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    Thanks for the con-ed, guys. I’ve heard of OOB’s in this weapon type but never saw one in person. Makes sense that OOB would be highly unlikely in this platform.
    RLTW

    Former Action Guy
    Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.

  6. #16
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    Quote Originally Posted by BC98 View Post
    The firing pin doesn't protrude enough from the bolt face until the bolt locks into battery to ignite a primer.
    Also the hammer can’t make contact with the head of the firing pin when it’s out of battery.

  7. #17
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    My comment was a bait cast.. thanks for making my point without me having to be a dick..

  8. #18
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    serious amount of lead down range in short order to get to cook off territory. I wouldn't think that a cook off from an M-16 type weapon would be all that bad because
    1. It's a closed bolt weapon and
    2. It's not belt fed. (far less chance of run away if you have a malfunction you can't clear) Just take the mag out keep the weapon pointed in a safe direction. For us, we wait 3-5 seconds but only have 10 to clear it.

  9. #19
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    Not a cook off in the chamber...but...in the mag. Or set off by a sharp pointy thing in the mag. It's pretty unanimous that it was a blown case.

  10. #20
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    So I was able to track down the fellow who had this incident. He said that the round in the chamber didn't cook off; one of the rounds in the mag went off. He said that shell casing has a gash about 1/8 inch long perpendicular to the extraction groove. He said it was a reloaded round.

    It looks like they've reloaded that shell one too many times.

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