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Something seems wrong with this primer pocket

Discussion in 'Handloading and Reloading' started by Hooda Thunkit, Jul 12, 2019 at 5:18 AM.

  1. Hooda Thunkit

    Hooda Thunkit Member

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    I was processing 7.62x54r brass from the Military bolt-gun shoot last weekend at the club (shot better than usual: 285-8x.... yeah, I suck at it...).
    I decapped the brass, washed, put it out in the sun to dry. Then, as per usual, I was cleaning the primer pockets prior to annealing. On one piece, the pocket brush just fell in...
    7.62x54r primer pocket missing 01 (Custom).jpeg

    7.62x54r primer pocket missing 03 (Custom).jpeg

    I seem to be missing something here. Anybody seen the bottom to my primer pocket ?

    I gotta admit, I've been reloading for 30 years, and I've never seen that before.
     
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  2. FROGO207

    FROGO207 Member

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    Also been loading for 30+years and never had that happen to me either. Thanks for sharing.:)
     
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  3. kcofohio
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    kcofohio Contributing Member

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    That'll raise an eyebrow or two.

    Normally, NNY/PPU has been decent brass for me. One in a million chance? Either, time to buy a lottery ticket, or you spent your odds!?
     
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  4. forty_caliber
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    forty_caliber Contributing Member

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    I've never seen that one happen before. A new addition to the scrap box.

    .40
     
  5. Nature Boy

    Nature Boy Member

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    Flash hole just a little larger than spec. No big deal :)
     
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  6. Rule3

    Rule3 Member

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    Thats what happens when you clean primer pockets you wear them out.:rofl:
     
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  7. Hooda Thunkit

    Hooda Thunkit Member

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    This is brass I've reloaded several times. No full power, mostly ~1700 fps.

    I can barely see a ring left in the brass where the base for the pocket used to be. I think it just blew out when the round was fired.

    What I wonder; would I have seen that before priming if I didn't clean the primer pockets ? I like to think I would, but we'll never know.
     
  8. jmorris

    jmorris Member

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    I would cross-section the case or another from the same batch. Would make me skeptical of the lot.
     
  9. Slamfire

    Slamfire Member

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    To find something similar you have to get in the way back machine, to a time beyond living memory. Naramore wrote a book titled Handloader's Manual and he shows pictures of primer pockets similiar to yours. These pockets were damaged by mercuric primers and the brass failed due to embrittlement.

    That brass is Hansen brass, Yugoslavian made, I bought Hansen back in the 1980's. I assume yours is of similar vintage. That ammunition is now reaching 30 years old and as a rule of thumb, gunpowder starts going bad around 20 years, and increasingly fails as time goes on. What could have happened is old gunpowder outgassing NOx (since there are water molecules in the case some of that converts to nitrogen dioxide) caused brass embrittlement in the case head. The primer pocket being a thin area failed first.

    I have written extensively on the topic of insensitive munitions. The primary and first response of shooters is denial, and then more denial. But as ammunition ages it does not get better, it gets worse. It can and does fail structurally, and it can and does blow up guns. Old bulk gunpowder auto combusts and burns houses down, and is the primary cause of all the ammunition dump explosions the shooting society ignores.

    A hand loaders time capsule

    Bad powder at such young age

    Old Ammo
     
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  10. total recoil

    total recoil Member

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    I think your primer pocket went the same way as the bullet when last fired. A remarkable occurrence yet harmless. Could be a marketing ploy to sell brass tho. :)
     
  11. ReloaderFred

    ReloaderFred Member

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    I had a whole batch of Bertram .45 Basic (3.25") brass do that on the first firing in my .45-120 Sharps. The brass was made too thin at the web, and Bertram did eventually replace the brass, since it costs $3.00 each, but I've purchased my last Bertram brass. Eighteen of the twenty rounds in the box all lost the web on the first firing, so yes, I've seen this happen before.

    Hope this helps.

    Fred
     
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  12. 460Shooter

    460Shooter Member

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    Well it’s certainly clean now.
     
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  13. Hooda Thunkit

    Hooda Thunkit Member

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    This is what I think too.

    I'm not concerned about the rifle blowing up, it's a Finn M39 built on an 1898 Mosin M91 Dragoon receiver. I'm shooting 17 grains of 2400 under 185 gr lead.
    Even if the brass split lengthwise, I'm confident the receiver would hold.
     
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  14. jmorris

    jmorris Member

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    That’s why I was curious about a cross section like these.

    I don’t even see it on this one.
    E749063D-4014-4FED-B5A4-599E43064DEF.jpeg
    But it’s very obvious on this one.
    7D18128F-091F-4EF1-933A-497E1AD99456.jpeg
     
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  15. sparkyv

    sparkyv Member

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    Talk about removing the primer crimp...


    For me, a new addition to my "Wall of Shame".
     
  16. lightman

    lightman Member

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    I can't say that I have ever seen that before. And I started loading in the late 60's! Good eye!
     
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