I read that these will stabilize with a 1:8 twist, but Sierra recommends 1:7.5 because a lot of "1:8" twist barrels are actually slower like how a lot of "1:7" AR-15 barrels are actually 1:7.7 twist.
I have a 7.5 twist 6.5 CM. These things hammer. 41.8 grains of H4350 at 2.900" oal. When my service rifle was getting blow to the 7 ring, these only caught wide 10's and tight 9's on a 600 yard high power target.
I have a 7.5 twist 6.5 CM. These things hammer. 41.8 grains of H4350 at 2.900" oal. When my service rifle was getting blow to the 7 ring, these only caught wide 10's and tight 9's on a 600 yard high power target.