akaslayer2
New member
Bought a cooper and am having a really hard time getting good groups have been reloading a bunch of different rounds but cant seem to get it tighter than about a 1.25". Called Cooper they gave me the load data what they test with and still not getting it any smaller. Its a 1/12 twist 20 ive been stick with 40-55gr. bullets. Tried noslersm sierras, hornady, and berger. Anyone have this gun or have some suggestions? Thanks