I have roughly 160 rounds through my Model 7 308 sense I bought it used from a friend. 60 copper and 90 lead. It seems to me with that many rounds through it the barrel would be fouled out but accuracy has pretty much stayed the same if I concentrate. 3/4 MOA. I do run the barrel with a wet patch of clp and then a dry patch after each outting, but have never used copper cleaner. Part of me is saying to use copper cleaner because the round count is high but sense I haven't lost accuracy I kind of think I shouldn't touch it. What do you guys think?