For me, something close to all purpose is simpler. My perspective of a blackpowder firearm, is an internal combustion engine. Water to clean, ok; water to shoot, (spit) not for me.
Olive oil, in its pure form is good down to sub zero for hunting. In my smoothbore, over powder wad, and cushion wad, with shot or even with patched ball works well.
Then with reverse thinking, as the temps get warmer, I add gradients of beeswax to my lube, to keep the oil from getting sloppy, and easier to handle in the field.
Just my habit and practice.
Olive oil, in its pure form is good down to sub zero for hunting. In my smoothbore, over powder wad, and cushion wad, with shot or even with patched ball works well.
Then with reverse thinking, as the temps get warmer, I add gradients of beeswax to my lube, to keep the oil from getting sloppy, and easier to handle in the field.
Just my habit and practice.