Thread: 308 Subs

Originally Posted by shooternz

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.

Could well be 14” want them as subs so the 151’s are the way I’ll go.