Just cleaned my McGowen 6.5x47L barrel with Butch's Bore shine. Only took about 20 patches, but the last three were spotless. I am breaking the barrel and I will settle down on the cleaning. After two good soaks and waiting about 5 minutes, I ran about 3 or 4 patches through and got a little blue on them, I am using RL15 and I spent more time getting the powder out vs copper.