Trimming cases

Discussion in 'Reloading' started by CjC73, Sep 28, 2018.

  1. CjC73

    CjC73 Well-Known Member

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    How do you all trim your rifle cases after depriming?

    Just curious as to how others do it. I'm still new to reloading but looking to step up and start to load all my own ammo. I started just with my 243 and used the Lee case length gage to trim to and then deburr inside and outside edges.

    Thanks!
     
  2. MagnumManiac

    MagnumManiac Well-Known Member

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    I load for over 30 cartridges, some require ‘special’ priming and trimming tools due to their size/length.
    For ‘normal’ cartridges, I use an RCBS Trim Pro with universal shell holder, this will only accomodate cases up to 416 Rigby rim size. It also utilizes ‘shell plates’ if I switch to it. I have made shell plates for 500NE and 505 Gibbs for this, but found the RCBS trimmer for these cases to do a better job.
    I trim in large quantities, always 100 cases or a lot more, so I adapted my trimmers to accept a battery drill attachment, saves my damaged shoulders from more injury.

    Cheers.
    :)
     
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  3. ShtrRdy

    ShtrRdy Well-Known Member

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    Check out the Lee case length gauge/trimmer and lock stud. If you have a drill you can speed things up with this arrangement.
     
  4. CjC73

    CjC73 Well-Known Member

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    Yes...I have this already. Just have to invest in more of them for each caliber I have I guess.
     
  5. 26Reload

    26Reload Well-Known Member

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    I also use the case lenght gauge....set the trimmer into a drill and hold cases in hand....never taking off very much at anytime...and always checking lenght for proper trim.....
     
  6. Deputy819

    Deputy819 Well-Known Member

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    I use the Forster Original Case Trimmer and then debur/chamfer with RCBS hand held vld tools.
     
  7. bob4

    bob4 Well-Known Member

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    Have a lyman case trimmer and a Worlds finest trimmer. (WFT) Can't ever seem to get the WFT dead on target. Always off by just a bit.
     
  8. thatguyshm

    thatguyshm Well-Known Member

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    I just switched to the Frankford Arsenal case prep center and have found after playing with it some that it is almost as consistent as a RCBS three way cutter. I saw variations around 1-1.5 thousandths at the most. That's just as good as new Lapua and Nosler brass, so it will work for me and it's quite quick.
     
  9. CjC73

    CjC73 Well-Known Member

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    Thanks all.... I think for now i'll keep using the case length gages. A lot of good suggestions for when I decide to upgrade though.
     
  10. AZShooter

    AZShooter Well-Known Member

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    Point of interest..... many factory/sammi chambers incorporate quite a bit of space to the end of the chamber. I suppose it is for any variables found in some manufacturers ammo, who knows for sure.

    I have measured several Factory chambers that were in the .050"-.070" range. Typically you can go several firings/sizing cycles before the brass gets close. It is conceivable that you could wear out the brass before you need to trim it! What I am saying if you KNOW the distance to the end of the chamber you can forgo trimming for quite a while.

    If you or a gunsmith used a custom reamer you can use the specs to know where the end of the chamber without measuring.

    To measure the distance to the end of the chamber you will need a Sinclair chamber length gauge:

    https://www.sinclairintl.com/reload...s/sinclair-chamber-length-gage-prod32925.aspx

    video on using the chamber gauge


    If you have access to a lathe you can make your own gauges. This information is from Varmint Al's website (thanks Al):
    https://www.varmintal.com/alath.htm#Chamber_Length_Gauge

    I use my lathe for trimming my cases. Use a cartridge holder I salvaged from an old Lyman case trimmer held in the jaws for the lathe. Use a stop for the carriage.
     
    Last edited: Oct 2, 2018