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Thread: Min. Barrel twist for 208gr Amax

  1. #1
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    Default Min. Barrel twist for 208gr Amax

    Just wondering if anyone knows what the minimum recommended twist for the 208gr Amax is. I have a 1:11 twist on a .300. Bergers shoot well out of it but I was wondering if anyone had any info on the Amax.

    Bo
    "No battle plan ever survives first contact with the enemy" - Unknown
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  2. #2
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    What does the manufacturer recommend for the speed you are going to be pushing it at?

  3. #3
    Member gunbugs's Avatar
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    Just run the greenhill formula for your bullet. #1, Divide the length of the bullet by its diameter in hundtredths of an inch. #2, Divide the constant of 150 by the result of #1. #3, Multiply the result of #2 by the diameter of the bullet. This will be your "ideal" twist. You can err on the side of a little faster, but a slower twist will generally impair accuracy.
    "A strong body makes the mind strong. As to the species of exercises, I advise the gun. While this gives moderate exercise to the body, it gives boldness, enterprise, and independence to the mind."

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