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Thread: Strange Ammo Malfunction

  1. #1
    Hammertime
    Join Date
    Apr 2016
    Location
    Desert Southwest

    Strange Ammo Malfunction

    I have been having recurrent problems with a lot of 124 grain PPU NATO Ammo. It locks up very reliable guns intermittently.

    It also sheds circular or near circular chunks of brass which I think end up in the chamber and prevent the gun from going completely into battery, which is the malfunction I am getting.

    My shooting area was cover s with these pieces after a few hundred rounds today and they were hitting me in the head and eye pro throughout the session.





    Malfunction OOB:


    Ammo box



    I am simply curious what causes this as I have never seen the problem before? I case gauged a few cartridges that failed to feed and they were in spec.

    I may contact PPU directly about the issue but wanted to get input from here as well. The culprit seems to be limited to 124 grain NATO as I have regular pressure stuff that seems to run fine.

  2. #2
    New Member schüler's Avatar
    Join Date
    Apr 2017
    Location
    TX
    I like me some Enel posts.

    Do fired cases indicate where these shaved bits are coming from? Jacket or brass?

    Have you taken a caliper to fired/unfired brass OAL?

  3. #3
    I would stop trying to gather data, and discontinue shooting that ammo!
    Likes pretty much everything in every caliber.

  4. #4
    Member Greg's Avatar
    Join Date
    Jul 2015
    Location
    Utah
    Normal shooting or was a hammer involved?
    Don’t blame me. I didn’t vote for that dumb bastard.

  5. #5
    Site Supporter LOKNLOD's Avatar
    Join Date
    Feb 2011
    Location
    Oklahoma
    I would like to see Unfired rounds next to fired brass.

    Does this appear to be limited to the HKs? Issue related to the stepped chamber somhow?
    --Josh
    “Formerly we suffered from crimes; now we suffer from laws.” - Tacitus.

  6. #6
    *****
    Last edited by Wendell; 04-24-2018 at 08:04 PM.

  7. #7
    Hammertime
    Join Date
    Apr 2016
    Location
    Desert Southwest
    Quote Originally Posted by LOKNLOD View Post
    I would like to see Unfired rounds next to fired brass.

    Does this appear to be limited to the HKs? Issue related to the stepped chamber somhow?
    I don’t know much about HK chambers. It seems to happen more in the HK, but it completely locked up a PPQ to the point I had to dismantle the gun, and remove a brass ring lodged in the distal end of the chamber.

    I think the ring is coming from the brass, not the jacket.

  8. #8
    Hammertime
    Join Date
    Apr 2016
    Location
    Desert Southwest
    Quote Originally Posted by GJM View Post
    I would stop trying to gather data, and discontinue shooting that ammo!
    But I still have a couple thousand!

  9. #9
    Site Supporter hufnagel's Avatar
    Join Date
    Feb 2011
    Location
    NJ 07922
    that much material it should be pretty damn obvious where it's coming from, if it's from the case!
    Rules to live by: 1. Eat meat, 2. Shoot guns, 3. Fire, 4. Gasoline, 5. Make juniors
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  10. #10
    Hammertime
    Join Date
    Apr 2016
    Location
    Desert Southwest
    More info as requested.

    Unfired OAL: 1.151”

    Cases next to unfired.



    Case gauge unfired.

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