I know its not a Ruger but......tried my Cooper 57M at 100 yards with 6 different kinds of ammo. Looking for some very accurate ammo and tried wolf, eley sport, eley standard, rem target, rem target by eley and some cheap federal hollow point bulk. Best groups 1 - 1 1/4 were from eley standard with a very close second with the federal bulk at 1 1/4 - 1 1/2. Does anyone out there in Rugerland have any suggestions on other target or match ammo? I really don't know what I can expect out of this rifle at 100 yards.