Stan,
I wonder why you are using black powder to fireform the cases? We knew it would require annealing and fireforming more than once (3 or4) to obtain straight walls, and the extra cleaning operations(washing) of black powder residue will add additional steps in the process. I recommend using a fast-burning smokeless pistol or shotgun powder with a 1/4 sheet of toilet paper tamped over it and the case filled with grits, worn out polishing media, corn meal, or cream of wheat, and another 1/4 sheet of toilet paper, Styrofoam (coffee cup), or wax to stop it off. The black powder not only leaves a lot of residues, but it takes up a lot of room needed for filler.
Mike
