There's always the SPG Lube sold for bullet lube smokeless or blackpowder. The secrete ingredient that made the black powder cartridge world stand on end in joy,,,,because it works and is said to be the best.......is unknown to me but I read it's medicinal mineral oil. Some people swear by mineraloil for a lube ingredient. Not me though after I tried it on patches while loading muzzle loading rifle. It caked up the bore with dry hard fouling pronto.
So......maybe mineral oil isn't good but......some swear by it saying that the most refined petroleum products aren't bad for blackpowder fouling as the old tale says.....oil based products suck for blackpowder lubes.
I know that the Lee Alox bullet lube used to be good for black. Then they changed it and now it sucks. There are lots of alox's and one of them is really good for black and they are oil based I guess.
First time I invented lube pills to use on the powder in cap&baller revolvers( there were already semi-geniuses that used grease cookies in smokeless rounds before me and too bad I didn't find it out sooner to save me the trouble of thunkin it out.)
Anywhoooo I might be the first to start putting the lube pills on the powder where they belong. No wait....I thunk E. Kieth used wool wads on the powder in his Navy Colt way before me. My claim tofame always ends in defeat.
Anywhoooo....that is not related to this thread except to make someone laugh a little. The point is.....there is an alox that is super good for black powder. Really good. There also used to be Hodgdon lube called Spit Ball and a Spit Patch that was so good with the black it amazes me. First time I used a Lee Alox/Hodgdon Spit Ball mix to make lube pills for the cap&ballers revolvers I fired five or six cylinders full of balls and then removed the Colt barrel to see what the fouling looked like.
The fouling didn't look like anything because there WAS NONE! The barrel was shiny like new and unfired with very few tiny specks of fouling.
I used that combo for the cap&ball revolvers till....the Hodgdon lube was made no more and they changed the Lee Alox to a different alox that didn't work for blackpowder.
By the way.....the Hodgdon lube was petroleum based.