There are blanks, and then there are " blanks". There are specific rules for re-enactor groups about what constitutes a " Blank" in that situation. NO wadding is allowed on top of the powder, for instance.
So, can you please tell us what you are wanting the loads to do? Are you shooting a replica Brown Bess, or an original? It makes a difference. Are you shooting a cloth Patched round ball, or a paper cartridge RB? It makes a difference. Are you shooting targets or hunting? Are you shooting shot loads? Do you want a powder and load for such work? Or are you just going to shoot RB loads for " live fire "?
There is plenty of advice on loading data for the Bess replicas on this forum. You just have to know how to find it. I am sure members will respond to your question, but if you answer mine, they will save us all a lot of trouble trying to give you the information you actually are wanting.