For cleaning the cylinder, I like to remove it and chuck it in a vise (with padded jaws), and use an oversize bronze brush, (.41 or .45 for .357 chambers), and chuck the brush into a hand drill.
Keep the brush wet with solvent (I use Ed's red) and run the drill/brush with a slight in and out movement in each chamber. It doesn't take long to get the chamber clean down to the metal.
Keep the brush wet with solvent (I use Ed's red) and run the drill/brush with a slight in and out movement in each chamber. It doesn't take long to get the chamber clean down to the metal.