Remmington, as compared to ,blaser, American eagle, Winchester, cci, remington fouls my cz cadet twice as fast as any other ammo. Observing fired casings there is always powder burn on the outside of the casing, so it appears it does not give a good seal and a lot of crap sneaks past the rim back into the chamber and action. Other ammo casings have no burn on the outside. Remmington of all flavors is dirty.