I shoot several guns that have removable brakes. Most are Kirby's PK models. They all get loaded up with carbon. Periodically, I submerge them in a bottle of bore cleaning solvent for a few hours and then try to clean them with a rag, q-tip or whatever I can get in the small openings. Nothing works very well. Is there any reason why I can't tumble them clean? The stainless steel media would probably do the trick but I'm guessing that it may affect the finish or cause some dimensional problems. Would a less aggressive media work? What do you think?