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40 S&W cases length.

Discussion in 'Handloading and Reloading' started by Hardatwork, Dec 5, 2007.

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  1. Hardatwork

    Hardatwork Member

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    Cases for 40 S&W are according to the reloading manual should be 0.850 in length. When are they to short for reloading? I have some that are 0.839. Thank You
     
  2. rcmodel

    rcmodel Member in memoriam

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    That .850" is MAX length.

    Hornady says "Trim too" length is .845"
    Speer says it is .840".

    Another .006" or .003" shorter isn't going to hurt a thing.
    Shoot them!

    [​IMG]
    rcmodel
     
  3. Hardatwork

    Hardatwork Member

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    IF 0.840 is OK should I trim them to the same height so I will get the same crimp?
     
  4. Walkalong

    Walkalong Moderator

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    It is not going to make any difference you will see on target. I have never trimmed any auto brass.
     
  5. rcmodel

    rcmodel Member in memoriam

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    I assume you are taper crimping them in the standard seating die, or using a Lee FCD.
    Regardless, length will not matter on any straight-wall pistol caliber.

    Just sort them by brand, or length, or whatever, and load them.
    At most, you might have to give your seating/crimping die a slight tweak, but probably not.

    And I'm with Walkalong.
    I have never trimmed, or worried about case length, on any straight-walled auto pistol brass in 45+ years reloading them.

    For anything else from the .25 ACP through the .45 ACP, I've never trimmed or measured one in my life.

    [​IMG]
    rcmodel
     
  6. Hardatwork

    Hardatwork Member

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    OK Thanks just wanted to Be safe.I have loaded these a few times and noticed that they were different lengths.Thanks for your help.
     
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