I just spent about an hour and countless patches trying to get a CVA .45-caliber Kentucky clean. I've done this over and over. After what seems like a lot of work, the patches still are gray. If I quit, give the barrel a swipe with T/C's Butter Bore, and put it away, I'll have rust the next time I check it. I use Pyrodex P, several different types of caps, and clean with T/C's cleaner. Just can't get it to take a reasonable amount of time. I use Pyrodex in my 1860 Army Colt replica and disassemble it; run a patch down the barrel and into each cylinder, then run it through the cycle in the family dishwasher. When it finishes, still hot, I spray it with WD-40. Not a scrap of rust. My T/C flintlock has a hooked breech and I use lots of hot water on it. No rust. That rifle, of course, has a diet of FFg black powder. Maybe I'm just overlooking the use of lots of water, but the Kentucky doesn't lend itself to water as it is a big pain to take the barrel off the stock, unlike the T/C Hawken. Anyone any sure fire ideas? Thanks, Graybeard.