I switched to Patch-Out before I bought a bore scope, and after I had bought a few new rifles. After bore scoping my old rifles that were cleaned with Sweets and Barnes CR-10 I was horrified at the condition of the bores on those rifles. The Sweets and the CR-10 can cause pitting. I am convinced of this now, FWIW. All of those rifles still shoot well, but they are pitted. All barrels since the switch are cleaner and pit free. Btw, when I first got my bore scope and was scanning all of my rifles, there were a couple Sweets only cleaned barrels, they were pitted and copper striped. pitting was through out and striping was in the first 8 or 9 inches. Now with the Patch-Out the new barrels are pit free and copper free. Take it all for what it is worth.