RE : Removing 'Carbon Ring'
Just another note to all interested - I had mentioned that I was getting some C-4 cleaner. Well, I had ordered a Teslong borescope on that same amazon.ca order on Feb-16, and due to the c-19 developing in China, my order was not filled. I finally got the C-4 but not the borescope, so I can't give a definitive judgement of the 'before' condition of the chamber. However, I ran several patches thru with the C-4 and they continued to come out with lots of black out of a barrel that I had cleaned 'thoroughly' with H-#9 ! It took about 6-8 patches to come out clean to my satisfaction, So I believe the C-4 is a 'Good thing' ;) Hoping that the borescopes become available sometime soon so I can give a better decision.