[pilgrim,
I never use blackpowder in my 9.3s, but the 9.3x72R(and similar cartridges)was originally a BP cartridge.If you will put up with the mess, BP may work better than "white powder". I am informed that the proper BP load is as much powder as the case will hold, with settling.They all caution against using petroleum based bullet lube with BP.Some use a wad.Member Sharps4590 has considerable experience with BP, maybe he will join in.
Mike