stephensackro
New member
I have a 9mm carbine that shoots great but gets some very hard carbon deposits in the grooves for the first 6 inches of the barrel (I'm assuming it is baked on carbon). The deposits are on most of the grooves and are only on one side of the groove extending 4 or 5 inches in length down the barrel. This stuff is as hard as cement and requires a lot of scrubbing with a copper scrub pad material. Nothing I have tried does even a half way good job of removing it. Does anyone know of a product that works good for this? Some people say that Bore Tech C-4 Carbon Cleaner works? I reload and use 124 gr FMJ round point bullets with win 231 power, some say it is because of the powder not burning clean and recommend using AA#2 instead. Your thoughts.