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dumb question on .223 case length and chamber

Discussion in 'Handloading and Reloading' started by CJK8, Aug 31, 2011.

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  1. CJK8

    CJK8 Member

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    Can I find out the max length my brass can be in my specific chamber by starting with brass at 1.760" (assuming the chamber meets SAAMI specs), seeing if it will chamber and keep trying brass that is .001" longer until it will not chamber? Is it that easy? And then I'll know what I don't want my fired brass to exceed? Thanks.
     
  2. Hondo 60

    Hondo 60 Member

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    Hmmm I've never looked at that way.

    First of all I take it you're talking about .223 remington.

    The book say max is 1.760 & "Trim to" Length is 1.750.
    So I trim to 1.750 & retrim above 1.755

    I would think the only way that your idea would matter is if it's in a match grade ultra high precision rifle.
     
  3. Historian

    Historian Member

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    All trimming will do is shorten the neck of your brass. To determine if it will chamber, you need to look at the location of the shoulder as well as neck length.

    Historian
     
  4. 243winxb

    243winxb Member

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    FL size 2 brass. Cut the neck off of 1. Place the smooth end of the cut neck piece againts the uncut brass case mouth. Now seat a flat base bullet nose first into both necks. Trim off a little at a time till round chambers. You will then know your throat/leade length. SAAMI chamber drawing here> http://www.saami.org/specifications_and_information/index.cfm?page=CC
     
  5. rcmodel

    rcmodel Member in memoriam

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    No, it isn't that easy.

    You don't want your .223 brass to exceed 1.760", period.

    Longer then that might start to enter the tapered rifling leade and go in O.K..

    But not have room enough to expand to release the bullet when it is fired.

    rc
     
  6. 243winxb

    243winxb Member

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    RCmodel is correct. When brass is longer than the 1.760" maximun, you enter what i call the "safety zone". Trim your brass when it exceeds 1.760"
     
  7. Walkalong

    Walkalong Moderator

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    As posted, it is not a good way to find out. If you really want to know, get some cerrosafe and make a chamber cast.

    It is no big deal though. Do not let your brass go over 1.760, and quit worrying yourself about it. :)
     
  8. Ol` Joe

    Ol` Joe Member

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  9. 243winxb

    243winxb Member

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    determine the true length of a rifle's chamber

    Ol' Joe, good link. thank you.
    Listening for the KABOOMS :eek:
     
    Last edited: Aug 31, 2011
  10. CJK8

    CJK8 Member

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    In another thread, my unsterdanding was to trim brass before it gets to 1.760" because 1.760" is the max it should ever be after it stretches when fired. Do I have that right? Thanks.
     
  11. 243winxb

    243winxb Member

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    Maximum is 1.760"
     
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