I was afraid that if I didn’t get the barrel back to 100% clean it would have I’ll effects? Again I don’t know what I’m talking about here. I’m not worried about a new barrel but one that’s already been used some. I wouldn’t bother with one with 1500 plus rounds either. I would just have it done after a new barrel. I’m not saying barrels are done after 1500 rounds just a example. Thank you for the replies.