CLP, CLP, CLP.
with 6k through 1 gun, 4~5k through another and 1k through my third Bushie, I haven't used anything else.
Why find a solution when there isn't a problem? CLP does it all.
(oh, I have tried some Bore Scrubber before. Worked fine, no problems. Really dries things out, though, and you still end up pulling CLP patches)