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Do you all trim 9mm brass?

Discussion in 'Handloading and Reloading' started by Matt Dillon, Jan 30, 2013.

  1. Matt Dillon

    Matt Dillon Well-Known Member

    I have a bunch of 9mm to process, and I dread the thought of trimming all of it. 9 mm is a relatively new caliber to me,and I always trim my straight walled cases, such as 38 and 357 magnum, because I roll crimp them. But I plan to use a Lee factory crimp die to give them a taper crimp. Thanks in advance for your help!
  2. soloban

    soloban Well-Known Member

    I don't trim handgun cases.
  3. flipajig

    flipajig Well-Known Member

    No I don't. Check for obvious damage sort out the non loadable tumble and load no trimming for me.
  4. Jenrick

    Jenrick Well-Known Member

    With soloban, I don't trim any of my handgun cartridges.

  5. jcwit

    jcwit Well-Known Member

    In a word, NOPE!
  6. MutinousDoug

    MutinousDoug Well-Known Member

    I don't shoot 9mm much but throw away all my .45ACP brass when it gets shortened to .885" OAL.
    By that time, I can't hardly read the headstamp anymore.
  7. beatledog7

    beatledog7 Well-Known Member

    Never have trimmed 9mm. Have trimmed a few .357 Mag.
  8. 45lcshooter

    45lcshooter Well-Known Member

    I just make sure its within the specs. Straight walled cased do not tend to grow. Sometimes but very seldom.
  9. icanthitabarn

    icanthitabarn Well-Known Member

    What a break I have from not trimming 9, especially since I have Lee, hand trimmed, everything else, and quite a bit of it. It still is sorted by stamp thou.
  10. italy176

    italy176 Active Member

  11. jmorris

    jmorris Well-Known Member

    Loaded hundreds of thousands, never trimmed one.
  12. Walkalong

    Walkalong Moderator


    Just adjust the taper crimp die to completely remove the bell on the shortest cases, and that will still be OK on the longest ones.
  13. CGT80

    CGT80 Well-Known Member

    I have loaded tens of thousands of pistol brass. The only ones that have grown are my 460 S&W mag cases. After 5+ uses, they were inconsistent and did not line up well with the canelure of the bullets.

    I run 9mm through a dillon 1050 with a bullet feeder, by the thousands. As long as I don't get 380 or 38 super mixed in, it is all good. Headstamp doesn't matter. My 9mm is used for local competitions, and performs just fine.
  14. Arkansas Paul

    Arkansas Paul Well-Known Member

    We load for .45 Colt, .40, .38 spcl, and .357 SIG. I have never trimmed a piece of handgun brass, even the ones I roll crimp. Never have had any issues either.
  15. Hondo 60

    Hondo 60 Well-Known Member

    Never - I haven't trimmed any handgun brass in eons.
    I tried to trim when I first started, cuz that's what the book said to do.

    But I found that 99.9% of the brass is at or very near the "trim to" length already.
  16. gamestalker

    gamestalker member

    Most reloaders I nwo don't trim rimless brass. However, I'm not one of those and have been maintaining all brass to within SAAMI spec., regardless of type. When I started relaoding several decades ago I read and followed the books to the letter and have been doing it this way ever since.

    My take on why I feel it is necessary to trim 9mm in particular is because,
    A. it head space on the mouth,
    B. if I were to apply a crimp to remove the belling I would want all the cases to have the same degree of taper crimp, and this is a head space related reason.
    There are several head space issues that can result if 9mm or other rimless cartridges aren't kept to within SAAMI spec.. I hear a lot of reloaders say that straight walled cases don't stretch beyond SAAMI spec., but in my experience i commonly see once and twice fired brass exceeding the allowable maximum as defined by SAAMI. In this regard I can honestly say that I have yet to experience a single mis-fire or other failure with any cartridge I've reloaded.

  17. kerreckt

    kerreckt Well-Known Member

    I have been reloading since 1982 and have never trimmed a case for a handgun round.
  18. ReloaderFred

    ReloaderFred Well-Known Member

    I've been reloading since 1963 and have only trimmed 5 Federal 357 Sig cases, just because I wanted to. My round count is well over 750,000+ rounds, and those five cases are the only handgun rounds I've ever trimmed, or ever will.

    Life is too short to spend it trimming pistol brass.......

    Hope this helps.

  19. jwrowland77

    jwrowland77 Well-Known Member

    Yep sure do.
  20. evan price

    evan price Well-Known Member

    Don't trim, don't sort, don't separate 9mm. Its all the same more or less. It works or it doesn't. Wow, could you imagine the time spent measuring and trimming 10,000 9mm cases....yeesh.

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