A combination of Palmolive, Tide and hot water- yes even for my modern "nitro" guns as well as black powder. I've quit using all these specialized niche cleaners- they can't be good for you.
If it has copper fouling, Sweet's 7.62 is guaranteed to get it, and I do it outside with gloves on.
Renaissance Wax or pure carnuba wax for rust protection, Rig +P stainless lube for internal lubrication and homemade "bore butter" with tallow for internal barrel coating.
I figure that if you shouldn't eat it or it's poisonous, I don't really want to be handling it all the time.