The more you use it the better it gets. Hose it down with Militech1, shoot it till hot, hose it down again. Go home, clean & hose it again. After three shooting sessions, done this way, a film will pennetrate the weapon metal and you should be good to go. I have had bad luck with Brown Bear with my AR, but don't have any left to try with my XCR. Wolf has been no problem after break in. S&B is great ammo. :2cents: