Rem 870 w/18.5 rifled barrel: Hornady 300 gr sabot slugs-almost rifle accuracy at 50 yds, every shot touching or nearly touching. Regular rifled slugs-Every shot inside 3 1/4" at 50 yds 2 3/4 buckshot-Nearly worthless. at 25 ft the shot had spread to like 30+ inches, even at 20 ft only 2 pellets hit on an 11 x 14 target, the rest blew all over the place. Other than point blank range it looks like a slug barrel is a slug barrel only. I don't know why the rifling makes the shot open up so fast. Makes the shot cup spin?