Finally getting the thing to group after a fashion.
Load was 18 gr 777 3Fg. Over powder card, deep lubed wad, home cast .453 round ball.
Shot at 25 yards foresight rested on the bottom of the black, bit more experimenting to do yet, fixed sight spirit of the original model seems to group well if I do my part

http://i610.photobucket.com/albums/t...m/BPpistol.jpg