J-B Bore Bright Bore Finishing Compound Years of Use by Competitors and Hunters

At the range, regular use of J-B Bore Bright between strings of fire minimizes the accumulation of jacket fouling to help maintain consistent accuracy. As a bore cleaner, the soft, oil- paste formula liquefies as you use it to quickly remove fouling, copper, lead, and powder residue in rifles and handguns, plus plastic deposits in shotgun bores.

eBay