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Type: Posts; User: ishoot10s

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  1. 21-05-2013, 10:28 PM

    Thread: Twist Rate - is there a simple rule?

    by ishoot10s
    Replies
    13
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    3,944

    I've got a spreadsheet set up with Greenhills...

    I've got a spreadsheet set up with Greenhills formula, which is this:

    Twist Rate = 150*(D/(L/D)) for velocities up to 2800 fps
    Twist Rate = 180*(D/(L/D)) for velocities over 2800 fps
    where D =...
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