Did chipmechanic say something.... must have missed it. His avatar reminds me of Kalashnikitty over at the Saiga-12 forums.
Use either Sweet's 7.62 Bore solvent or Barnes CR-10 Bore solvent when cleaning. Use either in conjunction with a good powder solvent. They are designed to clean out the copper fouling left in the bore from the shooting. Cleans out the copper VERY nice, just don't use a copper cleaning brush.