I would maybe try a .20 patch and see if that would work. If you have a Cabelas around they have pre lube patches at that size. As for the actually barrel its hard to say. I know lots of people with a pitted barrel and can shoot like no other. If it really bugs you, you have two options. Send the barrel back to TC and see what happens. More then likely they send you a new barrel free. Or buy a GM replacement barrel to the twist that you want. OR better yet, DO BOTH. Then look for another Hawken stock. Thats what i did with my Renegades. hehehehe