i just picked up my mosin nagant 91/30 yesterday. got it from sog, it has century arms international markings on it (cai). it was about what i expected although the bore looked a little dark. i scrubbed the barrel with a bronze brush using both regular solvent and then switched to the ammonia based copper solvent. never could seem to get it clean. every time i would get clean patches out of it and then go back to the brush, i'd get more (a lot) black "stuff" out of the barrel. even tried a few passes with a stainless brush to no avail. going to try it this saturday and see if the jacketed bullets slick up the barrel any. anybody got any ideas on how to get this thing clean or should i even try. don't want to scrub the rifling out of it!