Originally Posted by Derek M.
+1. I use this on the most stubborn bbls. However, I have found MT Extreme, and Gunslick foam to work very well. Wipeout is ok if you do long soaks (overnight) about 3x.
The only true way to see if you are cleaning the bore is with a borescope. I don't put a lot of weight into patch examination, unless it's black from powder fouling. KG-1 is a great powder fouling cleaner.
Gunslick Foaming Bore Cleaner is the best stuff I have used so far, it is phenomenal, and there is no ammonia, so let it sit in your bore overnight if you have too.
By the way, Hoppes makes nylon (tynex) brushes with stainless, not copper center.