OLD SWAMP HUNTER CO. BORE CLEANER: what could be more natural? This all natural bore cleaner can be used not only as a bore cleaner, but just as effective as an all-around gun care product. By letting OLD SWAMP HUNTER bore cleaner soak in the bore of your muzzleloader or pistol barrel and cylinder, this wondrous solution breaks down all that hard to reach grime from a hard day shooting. Just to help you prove to yourself the benefits of our bore cleaner, wash your firearm with the old products and let it sit for a week. Now run a dry patch through your barrel. That reddish film is rust forming. This won't happen after seasoning your barrel and using the OLD SWAMP HUNTER gun care system.