I've been shooting Remington Sluggers and Winchester Foster style slug out of my rifled barrels for years. A Mossberg 500 and Rem. 1187. Yes you can shoot rifled slug out of them but, they lead up really bad. You have to clean them. I've just this year started using Lightfield Hybreds. I have more money to spend on my ammo now days. If I owned that store that clerk would have been out on his a$$ refusing to sell a customer something