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Thread: Case failure

  1. #1
    Join Date
    15th September 2010
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    Case failure

    I was at the range last week and found a 9mm shell casing that was split in half midway between the case head and case mouth. The primer was also backed out quite a ways. What would cause a failure like this, improper headspace? Any other reason? I assume the other half was stuck in the chamber. What a nightmare!

  2. #2
    Join Date
    2nd June 2004
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    Double charge.

    This is why you should never shoot reloads obtained from other people.
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside
    Last edited by Hawkmoon; 30th December 2017 at 15:44.


  3. #3
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    15th September 2010
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    You are right about shooting other people's reloads! Assuming it was fired in a semi auto, would not the primer back out and then re-seat when the case head hit the breech face during its cycle?. Also, I did not notice the primer being flattened or showing any visual signs of excessive pressure. Then again, I am pretty new at this reloading game and refer to you more experienced guys!

  4. #4
    Join Date
    29th August 2017
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    Quote Originally Posted by .45s r best View Post
    ...
    I assume the other half was stuck in the chamber.
    ...
    Do you mean that the front half was missing altogether?

    Possibly the 9mm cartridge found its way into a non 9mm chamber.

    A 9mm can fire in a .40 S&W for example. The front half of the case usually bulges or splits lengthwise though in that case.

    Maybe a 9mm cartridge in a .357 Sig chamber? Or 38 Super?

    -
    Last edited by megafiddle; 30th December 2017 at 21:21.


  5. #5
    Join Date
    15th September 2010
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    Yes, the front half was gone. Looked like a reloaders nightmare to me!

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