I was doing a full cleaning of a Speed Six that I bought used and when I got a good amount of crud out of the barrel, I could see straight lines down the length of the barrel as if from a brush. I have shot this gun and it is very accurate. I was just wondering if anyone had pictures of damaged rifling from cleaning so I can compare it. The gun was made in 81 of march and shoots well so i'm not worried about it but just want to know what it is. Wanna kill these ads? We can help!