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Circles on cartridge head

Discussion in 'Handloading and Reloading' started by HOWARD J, Sep 21, 2012.

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  1. HOWARD J

    HOWARD J Member

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    I have a new set of shell holders
    On my 9 MM cases I noticed a circle appearing on the case head just outside the primer pocket. I thought it was the gun (or too heavy load ) but it was the shell holder making the circle in the brass head as I resized the case---anyone have this problem ?
    I does not appear to cause any problem other than looks.
    It does not cut very deep--maybe 32 inch
     
  2. Certaindeaf

    Certaindeaf member

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    Is it a Lee shellholder? You might want to get an RCBS as the Lee uses the same shellholder, dimensionally, for too many cartridges, in my opinion.

    It don't fit too good in other words.

    Is it around the rim or around the primer area?
     
  3. Josh45

    Josh45 Member

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    Can you post a pic so others can get a better understanding of what your talking about?
     
  4. bds

    bds Member

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    +1. A picture would be nice.
     
  5. HOWARD J

    HOWARD J Member

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    It is a set of Lee shell holders---my RCBS does not do it.
    It is a circle less than 1/16" past the primer pocket
     
  6. Certaindeaf

    Certaindeaf member

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    The Lee in some cases are a bit sloppy, if you have an RCBS shellholder, use that.
     
  7. HOWARD J

    HOWARD J Member

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    I will stick with RCBS
    I was happy to see that it was not one of my guns.

    I have about 10,000 rds thru the gun I was using---nickel plated P-35
    Still holding up good--Belgium made.
     
  8. Certaindeaf

    Certaindeaf member

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    Ah, upon reading your OP again, it's probably OK.
    First I thought it was affecting the rim and then that the primer seater wasn't lining up right.
    I'd still use the RCBS holder if you have it.
     
  9. Chawbaccer

    Chawbaccer Member

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    You would have to have a pretty wicked burr around the hole in the shell holder to make such a mark, and just how much pressure are you using to re-size 9mm?. Are you sure it isn't a primer crimp?
     
  10. helotaxi

    helotaxi Member

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    If the burr was that large, how do you get the case into the shell holder?
     
  11. HOWARD J

    HOWARD J Member

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    I put a 9MM case into the Lee shell holder---turn it over--see where the brass ends & the circle of the shell holder starts---that edge is higher than the rest of the shell holder making the circle in the brass case.
    Took me a while to find it as you can't see it with your eye.
    $$$$ happens :banghead:
     
  12. helotaxi

    helotaxi Member

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    If that's the case, hit it with a case chamfering tool to knock that ridge down.
     
  13. HOWARD J

    HOWARD J Member

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    [​IMG][/URL][/IMG]
     
  14. helotaxi

    helotaxi Member

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    A chamfer tool or a large drill bit turned by hand will take care of that.
     
  15. buck460XVR

    buck460XVR Member

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    Looks like an easy way to identify your empties at the range.......
     
  16. rcmodel

    rcmodel Member in memoriam

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    That is a military type primer crimp.

    Your shell holder couldn't do that to brass.

    There is no possible way you can be pushing on the case hard enough while sizing to swage a ring in a brass case head.

    rc
     
  17. helotaxi

    helotaxi Member

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    RC- I disagree. It's way to far out on the case head and way too shallow to be a crimp. The edge of the primer pocket is still pristine.

    If the burr is very sharp, it wouldn't take much pressure to mark the case.
     
  18. rcmodel

    rcmodel Member in memoriam

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  19. HOWARD J

    HOWARD J Member

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    There was no military primers in these CBC cases
    I can put any brass cartridge 9MM case in this shell holder & put that mark on it
    5 boxes of 50 cartridges with that mark
    It will go in the garbage---most of my Lee products work good. That
    cute close up photo makes it look worse than it is.
    In most cases you have to look real hard to see the mark--5 boxes & I finally spotted it.
     
    Last edited: Sep 22, 2012
  20. Chawbaccer

    Chawbaccer Member

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    That is Brazilian brass, I have seen it before, it is crimped.
    [​IMG]
     

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  21. HOWARD J

    HOWARD J Member

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    I ourchased it new---it was nice & purddy--NO CRIMP
    I still have some of the new
    I don't see any cut marks on that case ???????
     
  22. rcmodel

    rcmodel Member in memoriam

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    Well the question in my mind is still how you could possibly exert enough force while sizing a 9mm case to swage a ring like that in a solid brass case head??

    At least without some internal support to keep from tearing the rim off first.

    Any chance the de-priming rod is screwed down too far and supporting the case from the inside at full ram travel??

    rc
     
  23. HOWARD J

    HOWARD J Member

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    I checked on that first off
    It is as high as I can get it & still pop the primer
    Strange case
    I am on my way to buy a couple new RCBS # 16 shell holders

    I did try to fix the Lee but there was 3/16" of circle I could not get off-
    I give up easy now---comes from old age
     
  24. helotaxi

    helotaxi Member

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    It only looks like a light imprint. Nothing like a primer crimp. Considering that ring is the only place that the head would be touching the shell holder it wouldn't take much force to do that.

    I'd be interested in someone putting a strain gauge on a shell holder while sizing a 9mm. I' wager the pressure is higher than we'd think but the tiny case makes it seem like a small amount.
     
  25. FROGO207

    FROGO207 Member

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    I bet if you send the shell holder back to Lee with an explanation of what is wrong they will make it right. I would want them to see that they have a problem that they might need to correct for others. After all you did pay for a product that should work as designed.
     
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