My sidelock is pretty easy. Boil a pot of water, add some Murphy's Oil Soap, take out the nipple, pull the wedge(s). Stick the barrel, muzzle up into the pot, pump the soapy water in and out of the barrel. When it gets too hot to hold, pull it out and invert it so water runs out. Plug the nipple hole fill the barrel with alcohol, drain, lube, put the barrel back in the stock, nipple back in the bolster, and rifle back in the safe.