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240gr SMK

 
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  #1  
Old 05-04-2009, 05:38 PM
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240gr SMK

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
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Old 05-04-2009, 06:47 PM
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Re: 240gr SMK

Quote:
Originally Posted by trueblue View Post
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
1.582 give or take, depending on the meplat
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Old 05-04-2009, 07:28 PM
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Re: 240gr SMK

Thanks,jmden
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Old 05-05-2009, 08:57 AM
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Re: 240gr SMK

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 by Autorotate; 05-05-2009 at 08:58 AM. Reason: Can't spell
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Old 05-05-2009, 05:47 PM
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Re: 240gr SMK

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