"Developed by Charles L. ""Butch"" Fisher (1947- 2007), one of our country's best and most well known Bench Rest Shooters, this non-abrasive Butch's Bore Shine Bore Cleaner removes all forms of bore fouling - including copper - with minimal effort and no damage. Quickly removes carbon build-up in difficult to clean areas like the chamber throat. Removes lead, wax, and plastic shotgun wad buildup."