I bought a Krag carbine in 1994 and never did anything with it which was a mistake, most likely. The outside is as near 100% as one could wish for but the bore is pitted; bore scopes can be problematic. The rifle does not tumble bullets and accuracy is acceptable for my eyes, BUT I can't get the bore clean. The copper is finally out but I still do not get clean patches no matter what cleaner I use or how many times I scrub. Is it not possible to get all fouling out of a pitted bore; is trying for a spotless bore a fool's errand? I'm somewhat experienced in working on and maintaining firearms so don't need 'basic' advice. Have used both brass and nylon brushes along with Butch's, Shooter's Choice, Sweet's, and Tactical Advantage to name just a few. Comments...