I noticed today when i was finished breaking in my dads tikka in 7 mag, and when I was cleaning my remington .270 last night, that even after using sweets and a nylon brush, that I still have something in my barrel. I can see it at the muzzle with a flashlight. It looks to be on the rifling or in the grooves and appears to be a goldish color. Would that be copper fouling, or jacket fouling or what? Anybody know what it is or how to get it completely out? I dont really like the idea of cleaning a rifle and then to see it has a streak of goldish color in it, I just dont like it. Any help is greatly appreciated.