I've always used Hoppes #9 and a patch on a jag to clean my barrel. But I've heard that Hoppes #9 does nothing to clean copper fouling and that I should try something like Sweets 7.62 or any other ammonia based cleaner. Is this true that Hoppes won't clean my barrel or does it do a good job. I know all my patches come out with no signs of green or blue coloring. Thanks ???