7RUM 1/12 help

Discussion in 'Reloading' started by Limbic, Aug 8, 2010.

  1. Limbic

    Limbic Well-Known Member

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    I have a 7 rum with a 1/12 twist. I'm looking for someone with some experience with this slow twist to help me pick a bullet. I've tried 140 and 160Ab with little luck. The 140 actually gave me a lower coefficient on the JBM stability calculator but shot better. Not great but better.
     
  2. roninflag

    roninflag Well-Known Member

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    you do not say make of barrel or what you are hunting. i have a 12 twist hart barrel .243 .it shoots little tiny groups. my suggestion is to try a 120 baltip; 140 berger,139 horn.
     

  3. Limbic

    Limbic Well-Known Member

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    Whitetail. I think it is a lower grade shilen if there is such a thing. Hammer forged I believe.
     
  4. roninflag

    roninflag Well-Known Member

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    i shot several head of big game in the 80's with the 120 nosler solid base . including a big mule deer (180S) and a record book antelope. for any whitetail south of sask a 120 baltip should do it just fine.