I used to make quite a few muzzle loader bullets, but with all the hassle of starting over again, didn't list them in my catalog.
But send me a mold order and see what I do with it! -- I need only a slug that fits the muzzle tight, the weight bullet you want, and nose style, which can be any of the LBT listings which seem approiate to you. I have quite a few that aren't listed also, which I'll tell you about if you email me. Our website can generate an email to me for any questions about such details. LBTMoulds.com
Here is my preferred method of making muzzle loader bullets for any caliber. I cut the body, with lube grooves, so that it slips freely down the muzzle until a tiny driving band which is cut to slightly over groove diameter rests on the muzzle. A bump with a short starter engraves this band, which holds the bullet in place once it rests on the powder, and seals off any blow-by of powder gas upon ignition. Bullets must be cast of soft alloy, with pure lead being best except for the heaviest loads, in which case, 30-1 or 20-1 tin lead gets the nod.
Load experimentation is simple. Start with pure lead and load up till accuracy peaks with no leading. If you want more power than you have when accuracy begins to fall off, harden your alloy a bit and work up again.
LBT doesn't make a good blackpowder lube, though Blue soft is unbeatable for pyrodex and some of the new substitutes. If you will be shooting real black powder, it is hard to beat any of the brands of Wonder Lube, which are all made by one company and sold under various labels, as I understand it.