Twist Rate & Bullet Weight?
I am finally trying to figure out what my mini likes to eat.
The rifle it is a 196-5xxxx built in 2001 with a 1:9 twist rate. The barrel is 16" with a SEI muzzle brake and Guido Barrel Strut. Three shot groups from bags at 100yds. Ammunition was PRVI Partisan. (55, 62, 69, 75gr)
The results for each bullet weight were within 5" with one truly standing out over the rest.
The best grouping was under an inch .223 Match 75gr HP BT.
I don't want to look a gift horse in the mouth but I have read and been told that a 75gr bullet is too heavy for a 1:9 twist barrel.
NRA Life Memeber, NRA Certified Rifle Instructor, RWVA, CMP, ISRA