Take a look here for Round Ball ballistics Calculator: h ttp://www.ctmuzzleloaders.com/ctml_experiments/rbballistics/rbballistics.html
The following is taken from "The British Gunner" by J. Morton Spearman first edition appeared in 1828:
Official Brown Bess Musket charges ( I would not try... ) :
Proof charge: 23.334 drams (642 grains)
Service charge: 6 drams (165 grains)
Exercise charge (for blanks): 5 drams (138 grains)
wow thats a lot of powder. i have an original bess and do shoot it once in a while. id never dream of loading it up like that however


















































