My buddy came over with a new rifled slug barrel shotgun that he bought for his son's birthday..

He shot 19 rounds through the gun but because the slugs weren't the right kind he caked the rifling pretty bad.

I used Butch's Bore Shine, steel wool, brass brushes and mops driven with my hand drill to get it out but it took about three hours steady work.... Just wondering what products and tools you guys use to remove lead from barrels? thanks.