Not too much yet. It will be a round ball gun but I don't know the twist rate. They will be sending a mold with it so I can cast some balls. Weight of the balls should be around 1,750 grains in a .955 diameter and I imagine the charge rate will be in the neighborhood of 450 grains of Fg. I expect from those figures that it ought to generate around 1350 fps and around 6,000 pounds of muzzle energy. I hope the weight of the gun will be from 14 to 16 pounds to control recoil. It is supposed to be a copy of Selous' 4 bores and from photos of his muzzleloaders it ought to be a fairly short gun. I have no idea how fancy it will be but the Selous guns were quite plain.