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Thread: 308 Subs

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  1. 21-01-2019, 08:45 PM #4
    shooternz
    shooternz is offline
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    If it is a used match barrel it could have a 14" twist quite common in the days of the old 144 gr FMJ Australian ammo and projects,
    that could explain the unstable 200 grain the Greenhill formula say a 13" twist for the 200 grain higher velocity should work try them at 1600+fps.
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