I have a Mossberg 500 with Rifled Slug Barrel. My gun likes the Lightfield Slugs, Hornady SST and Federal Barnes Expander Sabot. The SST's and Expanders are good up to 200 yards, in fact they are guaranteed. The SST's are zeroed at 150 and 6 inches of drop at 200. My Mossberg is a tack driver for sure, 3 inch groups at 125 yards. Haven't tried anything over that.