240gr SMK

Discussion in 'Reloading' started by trueblue, May 4, 2009.

  1. trueblue

    trueblue Well-Known Member

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    Could someone measure the oal of a 30cal 240gr SMK for me. I would like to run a calc on twist required for a barrelto stabilize this bullet. Also want to know what the SF is on a 240gr at 3000fps in a 9.5 twist.
    Thanks,
    JIM
     
  2. jmden

    jmden Well-Known Member

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    1.582 give or take, depending on the meplat
     

  3. trueblue

    trueblue Well-Known Member

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    Thanks,jmden
     
  4. Autorotate

    Autorotate Well-Known Member

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    1.600 according to QL and Loadbase libraries. Mine measure up about like JMDENs do.

    Loadbase calculator using the Miller formula says you get a SF of 1.82 @ 3000 fps and a 9.5 twist.

    Informative post by Bryan @ Berger regarding twist rates and the math behind them.
    Question: twist rate for .338 bullets - Sniper's Hide Forums
     
    Last edited: May 5, 2009
  5. trueblue

    trueblue Well-Known Member

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    I came up with a similar SF with the help of the software Michael sent me.
    Good to know .