Moose Milk for the revolvers and rifle. That's around eight or ten to one, Ballistol in water. For the shotgun bores I run some Windex with vinegar through the bores, it cuts both the plastic fouling from the wads and the black powder fouling. Then I finish up with moose milk.
To get any fouling out of the Mod '92s action I squirt moose milk in 'til it drips and then blow it out with compressed air. This is a job best done either outside or in the garage. Although I've done it in a motel bathtub, just before showering. If you are traveling or don't have a good air compressor the canned air for cleaning keyboards and suchlike works, too.
I must have smoked too long before I quit, I can't smell moose milk. I like it because it cleans, then when it's dry the shootin' irons have enogh oil for routine use. I do dab a tad of my home made bullet lube on the base pins of my eyetalian Colt Clones. So far, no rust, no stoppages during a shoot.
It's funny, though, when I last fooled with black powder, back when I was a kid, I went through all kinds of hoo-raw cleaning black powder, boiling water, funnels, oil, cleaning the guns once each day for three days. THAT, and busy busy with learning how to to shoot my service revolvers and duty shotgun kept me away from BP for nearly forty years.
If'n I'd known back then what I do now not only would I have shot BP all that time but I would have kept some BP rounds for that short barreled pumpgun. I swear, popping a BP round into the air would have saved me more than one fight. I can think of more than one Billy Badass that would hear the BOOM! and see the flame and beg to get in the cruiser.