I bought one a few years ago and never really played with it until this year. Initially, I was totally disappointed but after sorting through cases (it likes small primers) and cast bullets, the one I bought is truely a keeper. First of all, the bore slugs at .308. I'm not sure who has checked their guns but mine is .308 and I slugged it twice to make sure. Second, the Lyman 311359 works wonders in this gun. I shoot them as cast at around 1,000 fps and lube with Johnson's paste wax and add gas checks. Scoped, I can keep five shots in a quarter at 50 yards with a pinch of Unique.