Sorry, Sweet Shooter is a cleaner, protectant, lubricant for the entire firearm. The revolvers that I've treated are slick enough that there is no build up in the bore from fouling. Nothing seens to stick to the metal when treated with this stuff. I started using it a few years ago and noticed it really was BP and substitute friendly. Anyway it appears that they have found somthing even (newer or better?) better or so they say but it's pricy and I was looking for someone who might be able to comment on if'n the new stuff was worth the price.