It's not just Remington barrels that won't shoot slugs. A fella shooting next to me on the range a couple weeks ago had a shiny new Bennelli slug gun that he had just ordered for - $1200. He was using Winchester Partition Gold ammo, and the groups, if you can call them that, were 10 -12 inches at 50 yards. He was leaving for an out of state hunting trip the next day, the reason for ordering the new gun, and he wasn't a happy camper. I wouldn't have been either.