I just cleaned my 300 WSM long range rifle after doing some shooting for data in preparing for an up coming F class match. I had fired 47 rounds today on a clean barrel. When I cleaned the rifle I got a cosiderable amount of copper fouling out of the throat of the rifle. I had never encountered this before with. The barrel is a stainless steel Lilja 1 in 11 twist and the log book tells that including the rounds fired today I have 981 rounds through the tube. Could this fouling be signs of the throat being etched and nearing replacement of the barrel? The accuracy was there and the fouling was not sever enough for the accuacy to leave but it had never did that before. And ideas or thoughts on this? Would polishing the throat area with something like Flitz or J.B. Brite Bore help any? Sure would hate to think this barrel is nearing the end after so few amount of rounds!