Hello, Richard. I have a 527 in .223 Remington. With selected handloads, it'll group 1/2" or so at 100 yards for 3 shots. I've not been able to get it to shoot as tightly with anything as WW Factory "BallisticSilvertips" in 50 gr. That will group just under 3/8". I like BRNO rifles and own three, the .223, .30-06, and .375 H&H. Best.