The loading changed slightly over the years. Early cartridges from Frankford Arsenal (1874) contained a 250 gr lead bullet & 30 gr gunpowder, likely equivalent to today's 2F grade. Cardboard wads would be added between powder & bullet, if needed, to take up any excess space in the load. The bullet resembles a round nose, except for a small flat point on the nose. This feature was likely from the bullet punch / swaging process. I haven't researched who sells an authentic mold, but don't expect the big makers to have an equivalent. If I wanted dummy rounds that look right, I'd use my 230 gr RN lead bullets - after making a flat with my small ball-peen hammer. For shooting, I'd choose one of the "big lube" designs.
Regards,
Slim