Theres a debate on whether the moly coated bullets are any good or bad for the barrell. I know I cleaned my friends gun that had been using them and it was like mud coming out of the barrell. They say once you use them you cant use any other bullet. Dont know if its true or not. This gun shot pretty good with them but after cleaning it and trying other ammo it never grouped again. Never put the wins back in it he ended up selling it.