WWE; I found that Bullseye was my best bet for smokeless. It worked well with RCBS-201 KT (truncated cone/semi wadcutter) and the big lyman .45 Keith type bullet at about 280 gr. The difference in POI was dramatic. (Heavy = higher, light = lower). As my frontsight seemed a bit low the 201 hit closer to POA so thats what I stuck with. If you have a bullet weight that hits close to home it will probably do the same with blackpowder. I have a 155 grain hollow base mould that was origionally designed for percussion use, and not made anymore. It gave the BEST groups, as long as I selected bullets with perfectly filled out skirts.
For BP loads use the BP charge selection criteria. With the bullet you select, put in enough FFFg to allow some compression.
I don't think I am allowed to state my loads, and I have to look up my records anyway, but PM me if you want the details.