hey all!! dammit, bought my p220 about 3yrs ago. started off bad with wolf ammo and several ftf. unknown to me at the time wolf is evil ammo,cheap and dirty. the barrel still shows scars even after cleaning with bore brush, rem oil and hoppes 9. mr gunsmith will be next move. the rifling has black deposits of shit( powder residue and heavy lead deposits). if i shot say 75 rds thru to heat up the barrel and quickly dissasembled and rescrubbed the barrel would it come clean?