Serial#72 seems wrong- maybe call them. On the Pyrodex, normally you would shoot P (pistol) rather than the RS. I think the RS compares with ffg which burns a little slower than fffg. If you have a brass frame I would load a volume equivalent of around 17 grains of rs, then a pre-lubed wad, then the ball. If you don't want to use a wad then the powder, the ball, and cover the end of the chamber with Crisco. Personally I like wads, they move the ball closer to the front of the cylinder which often improves accuracy and they sort of clean out fouling in the barrel from a previous shot, and they are a good seal to ward off a chain firing. The Crisco is messy and some times burns out or melts away before all the chambers are fired.