Originally Posted by
rfd
ay, caramba! NO boiling water, NO hot water, NO warm water - use plain tepid tap water for a good barrel that has been properly maintained. we do not want to open the "pores" of the metal and invite flash rusting, which will always occur sooner or later, typically sooner as the patches come out the muzzle reddish brown, which means you have failed. diligence, plain water, and oil, are yer gun's best friend, and yours, too.
"what tepid tap water?" the stuff that flows out yer house sink's faucet.
"aren't there salts in some water softener systems?" yes, but in amazingly minute amounts, we're not allowing the water to linger, and it will get swabbed out and followed by gun oil. if this is still of concern, use distilled water for gun cleaning ... but that's a waste of money.
"what about using moose milk?" i was an MM advocate for years but have decided to fully separate the water from the moose. one issue with making/using generic moose milk (water + water soluble oil) is that THIS water needs to be salt/mineral free because it will linger on the metal, which means using distilled water for the mix. plain water for the slosh cleaning, followed by a good gun oil, is honestly all that's needed once a gun has been well maintained and is in a form of "metal equilibrium".
have the barrel and lock been maintained well? meaning, addressing the bp residue immediately after the last shot of the day is taken by simply removing the flint/nipple and spritzing the entire lock and swabbing the tube with some manner of "proper gun oil" (ballistol, CLP, whatever - not WD40!) with a few patches, and leaving the patched jag down the tube 'til yer back at the ranch and can do the barrel and lock justice. oil keeps the gunk soft and is a barrier to prevent air from activating the gunk into corrosion and rust. in doing so, cleanup is SO easy and fast and complete. there is no need for any kinda "bore cleaning concoctions". just maintain responsibly and immediately with plain water and oiled patches. your precious gun will thank you decades later.
IF the gun has not been well maintained, THEN the use of gun cleaning concoctions, along with copious amounts of elbow grease and gobs of time, will most likely be required to bring the gun back to life and ready for continued proper maintenance.
YMMV, do enjoy.