Every now n again I use the drill method, to really shine em up.
It still freaks me out a little, lol...but it is so fast n does a hell of a good job
I do like to get the bores well wetted with solvent n leave for a bit, wet again n leave (not dripping wet of course), then have at it.
It sure is a beautiful sight, to look down a freshly cleaned, oiled & shiny, mirror like set of bores, eh?
franc