I have a RRA with a 1in8 24'' EOPand it will put 3 50 gr blk hills remanufactured .223 ammo in one ragged hole at 100 yds. It shoots anythingI feed it well. What is nice about the tight twist is you can shoot 68 or 69 gr bullets awesome plus the lighter 50-55 gr ones too, where you can't get a heavy bullet to shoot accurately in a slow twist bbl.