inline muzzleloaders ... I use a mix of 91% isopropyl alcohol and car windshield washer fluid 50/50. Damp a patch and work it from the muzzle to the breech in short strokes, getting the strokes longer as you go down the bore. Flip that over and work the other side. Then run two dry patches afterward to make sure the bore is dry before loading the next round.

traditional rifles.. I use 91% isopropyl alcohol to swab the barrel. I swan in the same manner as I do with an inline.