I had alot of rust coming out of my barrel. Ask Cayugad! I showed him a pick. It is too large to upload in a post. I know I could scrub that barrel and It probablywould be fine.no matter what I do I am thinking hard about getting a GM 58cal roundball barrel. The problem with my barrel is my the last person who used it put bore butter in it and it sat for 30yrs! If I were to get a GM nothing but a good Grease or oil will touch that barrel!