Champfering 9mm brass

Discussion in 'Handloading and Reloading' started by Pahonix, Apr 14, 2021.

  1. Pahonix

    Pahonix Member

    Joined:
    Mar 26, 2021
    Messages:
    66
    At what stage do you do it? After deprimed/resize? Before or after tumbling? Before or after belling?
     
  2. Ifishsum

    Ifishsum Member

    Joined:
    Jun 21, 2005
    Messages:
    1,087
    Location:
    Portland, OR
    I don't chamfer most pistol brass....belling stage pretty well takes care of starting the bullet. Rifle cartridges I chamfer, after cleaning, sizing and trimming. Thereafter it only gets chamfered if/when I have to trim it again.
     
  3. PO2Hammer

    PO2Hammer Member

    Joined:
    Nov 30, 2003
    Messages:
    3,825
    Location:
    MINNESOTA
    No trim, no chamfer, no measuring 9mm brass.
    I'm pretty fussy about 9mm accuracy, and I see no need for any of that.
     
    sparkyv, Howland937, mdi and 11 others like this.
  4. Lennyjoe

    Lennyjoe Member

    Joined:
    Dec 24, 2002
    Messages:
    7,078
    Location:
    Southwestern Ohio
    Same here
     
    sparkyv, rfwobbly and Pahonix like this.
  5. WeekendReloader

    WeekendReloader Member

    Joined:
    Dec 3, 2020
    Messages:
    404
    Location:
    SE Michigan
    I chamfer and debur only if I trimmed the brass.
     
    reloaded_in_pa, Pahonix and bersaguy like this.
  6. Pahonix

    Pahonix Member

    Joined:
    Mar 26, 2021
    Messages:
    66
    Thanks for the responses! I appreciate the advice
     
  7. AJC1

    AJC1 Member

    Joined:
    Jan 14, 2020
    Messages:
    2,793
    Location:
    Memphis
    I only chamfer 9mm if I'm loading lead most likely out of habit.
     
    tightgroup tiger likes this.
  8. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    67,007
    Location:
    Alabama
    I never deburr/chamfer auto pistol cases, never an issue. Revolver brass yes, auto no.
     
    ausrobbo and Demi-human like this.
  9. cfullgraf

    cfullgraf Member

    Joined:
    Oct 19, 2010
    Messages:
    10,412
    Location:
    East TN
    If I'm loading cast bullets in any handgun cartridge, semi or revolver, I chamfer the case mouth. It helps minimize shaving of lead off the bullet upon seating. Chamfering gets rid of the sharp corner of the inside of the case mouth.

    Generally, it only needs to be done once and can be done about anytime the spirit moves you.

    I do not trim semi-auto cases but I do trim revolver cases that will fire full power charges. A uniform crimp from case to case is necessary so they get trimmed. The case mouths have to get chamfered to remove the flash from trimming.
     
    tightgroup tiger and AJC1 like this.
  10. WeekendReloader

    WeekendReloader Member

    Joined:
    Dec 3, 2020
    Messages:
    404
    Location:
    SE Michigan
    @cfullgraf @AJC1 Why the distinction of chamfering when using cast bullets? I flair the case mouth to seat bullets, I don't chamfer the case to guide the bullets. If the brass is trimmed I debur it, but the flaring/belling of the case mouth by the expander die supersedes any chamfer.
     
    mdi likes this.
  11. AJC1

    AJC1 Member

    Joined:
    Jan 14, 2020
    Messages:
    2,793
    Location:
    Memphis
    I just like to knock down any sharp edges. I powder coat so shaving means barrel scrubbing. That's about as much fun as dishes.
     
    tightgroup tiger and Demi-human like this.
  12. Herman B

    Herman B Member

    Joined:
    Mar 15, 2018
    Messages:
    146
    First thing I do with all new handgun brass is to lightly chamfer it before anything else. No need to do so again unless trimmed. And I've yet to trim.
     
    ballman6711, lordpaxman and AJC1 like this.
  13. Dudedog
    • Contributing Member

    Dudedog Contributing Member

    Joined:
    Oct 19, 2013
    Messages:
    6,421
    Location:
    Southern CA
    For 9mm
    Quick wet tumble after bringing it home form the range
    Resize/Deprime wet tumble again
    Sort by head stamp
    Case gauge brass, toss bad ones
    Uniform primer pockets
    Trim to length
    Chamfer case mouth
    Weigh same head stamp brass, toss out any that are more than +-3gr from the average weight
    Weigh all powder charges when loading
    Weigh all bullets remove any that are +- 1.5gr from the average
    Load ammo
    Case gauge loaded rounds
    Place in boxes
    Place boxes in ammo can with moisture absorbent
    Wake up realizing I was having a bad dream.

    In truth I do some of the above;)
    I am over 60 and life is to short to mess with 9mm brass much, I have rifle brass for that.
    9mm, clean, toss steel/AL/ones with ledges, load shoot, repeat (I do case gauge since I use scrounged range brass)
    Never measure it or trim it (except when I made some 9mm MAK brass)
    I don't sort by head stamp but I can understand why some people who do. (I would be hard pressed to shoot the difference, and sure can't when shooting USPSA)
     
  14. Lafitte

    Lafitte Member

    Joined:
    Jul 24, 2014
    Messages:
    409
    Location:
    East Texas
    I never champher any brass unless I have trimmed it. It is more of a de-burring operation.
    Lafitte
     
  15. Pahonix

    Pahonix Member

    Joined:
    Mar 26, 2021
    Messages:
    66
    Thanks everyone for the replies.

    A buddy recommended it because I'm getting little scrapings after crimping.
     
  16. cfullgraf

    cfullgraf Member

    Joined:
    Oct 19, 2010
    Messages:
    10,412
    Location:
    East TN
    Also, besides not shaving ther bullet, chamfering the case mouth allows me to flare less which works the case mouth less.
     
    AJC1 likes this.
  17. derek45

    derek45 Member

    Joined:
    Jun 21, 2007
    Messages:
    279
    Never.

    just give it a little flare, like the boss on Office Space likes.

    negWmqV.jpg
     
    MFInc, Walkalong and Pahonix like this.
  18. Pahonix

    Pahonix Member

    Joined:
    Mar 26, 2021
    Messages:
    66
    That's a really good pic. I'm gonna try to make a similar pic today
     
    Walkalong likes this.
  19. DanK3Pos

    DanK3Pos Member

    Joined:
    Oct 20, 2019
    Messages:
    194
    That just means you need more flare on the case mouth. Lucky you. I always learn the hard way.
     
  20. rfwobbly

    rfwobbly Member

    Joined:
    Nov 14, 2008
    Messages:
    5,306
    Location:
    Clarkesville, GA
    If I am loading SD ammo for myself, I will chamfer the inside of the case at the primer hole to knock off the "hanging chad" left by the punching process. That is the only chamfering I do, and that is the only instance in which I do this.

    The RCBS Case Prep Center includes a neat tool to do this.
     
  21. mdi

    mdi Member

    Joined:
    Dec 31, 2007
    Messages:
    3,867
    Location:
    Orygun!
    All the above posts are dealing with chamfering case mouths. When I first read the thread title I immediately thought; "Case mouth or primer pockets?". I have a bunch of NATO 9mm brass that needed primer crimps removed. Tumbling and removing primer crimps is about all I do to my handgun brass...

    The answer for "scraping or shaving" bullets is more flare. But if you want to chamfer the case mouths, go ahead. It won't hurt anything unless you cut enough metal to make a sharp edge on the case mouth...
     
    Last edited: Apr 22, 2021
  22. lordpaxman

    lordpaxman Member

    Joined:
    Jun 4, 2011
    Messages:
    1,078
    I don’t chamfer unless I trim, and I don’t trim 9mm. Do you seat and crimp in the same step? Can you tell what the scrapings are - from the brass or the bullet? Show pictures and we can try to help solve the real problem. Good luck.
     
  23. MFInc

    MFInc Member

    Joined:
    Dec 5, 2020
    Messages:
    274
    I did when i first started. But after reading on here and seeing some video's, I decided it wasn't necessary for my 9mm loads. I just bell them enough to where it starts to seat slightly with a squeeze from my fingers. too much and I can hear it scraping in my die. I do get tiny tiny shavings of brass when seating and then crimping.
     
  24. Laphroaig

    Laphroaig Member

    Joined:
    Feb 24, 2013
    Messages:
    1,792
    Location:
    W. PA
    I assume that you are seating and crimping in the same step. Longer pieces of brass get crimped a little more while the bullet is still being seated causing the shaving. Chamfering will help minimize the shaving. A better solution is to seat and crimp in two steps.
     
  25. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    67,007
    Location:
    Alabama
    We shouldn't be putting so much taper "crimp" on a 9MM that we would shave a bullet even when seating/crimping together. That said, I usually crimp in a second step because I have the space on the LNL to do it.

    Some thoughts on crimping in one or two steps.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice