My smooth bores shoot 3" groups @ 100yrds all day. I went to rifled shotguns not only to shoot more accurately but to extend my shooting distance and to have a much flatter trajectory. My rifled shotguns are sighted in with sabots with a Nikon BDC reticle to 200yrds. They are both 12ga but if I did much hunting anymore I'd like to get the Savage 220 20ga rifled slug gun or a rifled barrel for one of my 12ga 1100.