Odd Looking Rust Patterns On 9mm Cases

Discussion in 'Handloading and Reloading' started by peeplwtchr, May 30, 2021.

  1. peeplwtchr

    peeplwtchr Member

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    Hi All-

    I was pecking at the range yesterday, and came across a lot of cases with banded rust patterns on them. They are all stepped OZK headstamped. Any idea what could cause the patterns?
     

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  2. ballman6711

    ballman6711 Member

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    I would guess that they are steel cases with a brass finish, but it really is just a guess. Try using a magnet on them.

    chris
     
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  3. peeplwtchr

    peeplwtchr Member

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    Good idea, they are attracted to magnets.
     
  4. Walkalong

    Walkalong Moderator Staff Member

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    Then there there are two reasons to trash them, they are magnetic, and they are stepped.
     
  5. Rule3

    Rule3 Member

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  6. Charlie98

    Charlie98 Member

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    That was the first thing I homed in on... I treat stepped 9mm cases like the plague.
     
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  7. Charlie98

    Charlie98 Member

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    OP, I can't see by the photos you posted... are those Berdan primed?
     
  8. peeplwtchr

    peeplwtchr Member

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    Nope.
     
  9. Charlie98

    Charlie98 Member

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    Interesting....
     
  10. FROGO207

    FROGO207 Member

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    I have saved all my stepped brass cases in a container but at the present time without data for them and not wanting to experiment they will sit. Especially since 9MM is so plentiful these days. I now run a strong horseshoe magnet through my range brass before sorting to remove the disguised steel junk. I do save them with my other sreel scrap as it all adds up over the long run. Weight is weight no matter what it is you recycle.
     
  11. peeplwtchr

    peeplwtchr Member

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    Good advice, I might start doing that too if I keep finding never seen before headstamps.
     
  12. FROGO207

    FROGO207 Member

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    This shows how lazy I am! Not worth my time handling it all to sort by headstamp before decap and clean.
     
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  13. rfwobbly

    rfwobbly Member

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    Not good....

    iF8g9zCh.jpg
     
  14. FROGO207

    FROGO207 Member

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    I will take the primers out of mine to go in the primer bucket should I scrap mine as those are still brass and worth more. Just as I put shotshell primers into the steel pile.
     
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  15. Charlie98

    Charlie98 Member

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    This is one of the reasons I cull my 9mm brass... I don't like mystery meat brass in what is a pretty high pressure cartridge. I only use WIN, FC, RP, and PMC brass in 9mm. I'm even pretty leery about using mix-master brass in .45ACP. I was doing a brass inventory just yesterday, and I went through my '45 ACP JUNK' brass box to see what was in there. In these days of waste not whatnot, I'll probably keep it... but I think I'll wave a magnet over it to see what's really in there, that's a good idea.
     
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  16. Dudedog
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    Dudedog Contributing Member

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    I toss the stepped stuff because I had one separate at the step with a midrange load (case history unknown).
    Front half was stuck in the chamber. (removed when I got home) Lucky it was practice and not in a match or something more serious.
    All the stepped stuff now goes in the recycle can. (if it's brass, trash if not)
    As a side note all the copper coated steel ones tend to come out of my wet tumbler kind of pink if they manage to sneak in, easy to spot.
    Steel - toss
    Stepped = toss

    The above cases are both so toss a long ways:D
     
    Last edited: May 31, 2021
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  17. peeplwtchr

    peeplwtchr Member

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    Magnet order placed, thanks!
     
  18. Walkalong

    Walkalong Moderator Staff Member

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    I don't remember where I got this magnet, you can get smaller versions out of microwaves.
    Brass Magnet.JPG
     
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  19. peeplwtchr

    peeplwtchr Member

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  20. Dudedog
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    Dudedog Contributing Member

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    If you have any dead hard disks there are some nice strong little magnets in them.
    You will need some small torx bits to get them open.
     
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  21. conan32120

    conan32120 Member

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    s&b brass attracted to magnet? could it be the primer causing that?
     
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  22. rfwobbly

    rfwobbly Member

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    No, those were brass-plated steel cases my friend. Not every S&B case is that way, which is why you need to check.
     
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  23. peeplwtchr

    peeplwtchr Member

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    Damn, S&B? I have lots, just loaded some today.
     
  24. greyling22

    greyling22 Member

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    Fwiw, I have reloaded steel and aluminum 9mm cases. (they slipped in the progressive and I didn't notice till after the sizing) They shot fine.

    I don't recommend it, but it can be done.
     
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  25. Pat Riot
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    Pat Riot Contributing Member

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    Thank you for showing that photo. I will definitely be running a magnet through my brass.
     
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