[targa911S]

More barrels have been ruined by bore brushes than not cleaning them that is for sure. DO NOT use copper cutting agents on a nickel plated gun. It will eat away at the copper base of the metal and the plating will start to flake off. FWIW my CZ 17 hmr shoots much better dirty than it does clean. I really like Cleansoil for a good all around cleaner and solvent. RIG as a lube and rust preventative.