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anyone seen hair-thin ring of trimmed brass at the bullet neck just after seating?

Discussion in 'Handloading and Reloading' started by shekarchi, Oct 25, 2013.

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  1. shekarchi

    shekarchi Member

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    I have only been re-loading a couple of months...
    I have noticed on at least 2 occasions that right after I seat a bullet in the case when inspect the cartridge [on some cases] there is a hair-thin piece of loose brass -that judging by how it looks- looks like it is coming off the edge of the neck. Is it because I am over-chamfering and/or over-deburring? I also notice the phenomenon when seating takes a bit more effort than usual...
     
  2. rcmodel

    rcmodel Member in memoriam

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    Normally it's a sign of no chamfering at all.

    Sure you didn't miss doing a few??

    rc
     
  3. 918v

    918v Member

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    If the case walls are too thick and the seater die is too tight, or is set to crimp prematurely, jacket material will be shaved off the bullet, chambered or not.
     
  4. Rule3

    Rule3 Member

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    I always helps to know more information such as what caliber, lead or FMJ bullets, press and dies.

    If it is handgun or rifle?

    Handgun could be not enough flare and you are shaving the bullet, but without more info, just guessing??
     
  5. moxie

    moxie Member

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    Could be lack of de-burring and/or over crimping.

    Make sure the brass is de-burred as well as chamfered. Start over and re-set your seater/crimper die per instructions.
     
  6. Joe's

    Joe's Member

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    shekarci,
    I'm guessing your talking about rifle brass, ("over-chamfering and/or over-deburring").
    If it's only happening on a few of them check your case and make sure it's not over length. If it is, trim your brass. If not, back your seater die out about 1/4 turn and try again. If it gets better then continue to back the seater out 1/4 turn until finally no "hairs" are left. You'll end up with less crimp on some cases, however it will be sufficient. They will never have the same amount of crimp unless you trim to the same length.
    Hope this helps!

    Be Well,
    Joe's
     
  7. gamestalker

    gamestalker member

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    Yep, I've had it happen a few times when loading wheel gun cartridges. And since I meticulously trim, ream, and chamfer all my brass, I was able to identify, and eliminate the problem, which was caused by over crimping. No biggie, just back off the crimp a tad and it will go away.

    GS
     
  8. au_prospector

    au_prospector Member

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    http://www.thehighroad.org/showthread.php?t=707429

    Yes, like this. See pictures in post #5. I did not trim, chamfer or debur my brass. Happened on .357 loadings crimping to the cannelure. Simply wiped the brass hairs away with a cloth. They shot fine.
     
  9. Hanshi

    Hanshi Member

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    I have on a few occasions but they shot right along with the good stuff.
     
  10. CarJunkieLS1

    CarJunkieLS1 Member

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    I've always deburred and chamfered my cases after I shoot them. I also take a bristle brush that has case lube on it and lube the mouths of the cases before seating. It seems to help stop those "slivers" from happening and makes bullet seating a little easier.
     
  11. Mohave-Tec

    Mohave-Tec Member

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    Factory crimp die
     
  12. Walkalong

    Walkalong Moderator

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    This problem can be solved while still using any crimp die out there.
     
  13. Hondo 60
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    Hondo 60 Member

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    Yes, I've seen those.

    It's either brand new brass, or brand new dies.

    At least for me, that's the only time I've seen that.
     
  14. fguffey

    fguffey Member

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    Shear, when the case bell is removed by the seating die the bell can be larger than the dies ability to close it. Then there is a chance the case is not centered in the shell holder, in any case the die shears off part of the bell.



    F. Guffey
     
  15. Havok7416
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    Havok7416 Member

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    I've seen this happen before with 9x19 and my solution was to back off the seating die a hair. No problems anymore.
     
  16. shekarchi

    shekarchi Member

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    thanks everyone for your comments and helpful information...
    I am using Hornady New Dimension dies in .300wsm and .270win
    I chamfer and de-burr every case before loading.
    I don't think I have set the die for a crimp at all but if it helps it happens when seating takes a little more effort than usual...
     
  17. fguffey

    fguffey Member

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    Rifle? Not pistol? The new dimension die has a guide, I believe I would be hard pressed to find a Hornady New Dimension die that crimped.

    That leaves 'roll over' brass at the neck of the case during case preparation.

    F. Guffey
     
  18. shekarchi

    shekarchi Member

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    anything I should be concerned about?
    and if so- what to do to avoid it?
    thanks
     
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