I don't suppose many (any) people outside of the USA hunt with black powder guns, but there are a goodly number of people both in the USA and in Europe who enjoy shooting historic black powder guns, or reproductions of them.
Creating a program that simulates the internal ballistics of black powder guns is difficult and it has been found very difficult to get accurate figures for the burning rates of black powder. Numerous experiments have been done over the years, but with little agreement. However, Don Miller (1996 Precision Shooting Annual) and Henning Umland both produced empirical equations fitted to practical results of muzzle velocity and muzzle energy which seem to work quite well. I then refined a burning rate for black powder to tune a full numerical internal ballistics simulator so that it closely agreed with these empirical equations, and here it is.
Both QL and GRT use the Don Miller equation for black powder simulations, but they do not give any pressure indications as the formulae only deal in muzzle velocity. My program is quite unique in that it does predict pressures.
Creating a program that simulates the internal ballistics of black powder guns is difficult and it has been found very difficult to get accurate figures for the burning rates of black powder. Numerous experiments have been done over the years, but with little agreement. However, Don Miller (1996 Precision Shooting Annual) and Henning Umland both produced empirical equations fitted to practical results of muzzle velocity and muzzle energy which seem to work quite well. I then refined a burning rate for black powder to tune a full numerical internal ballistics simulator so that it closely agreed with these empirical equations, and here it is.
Both QL and GRT use the Don Miller equation for black powder simulations, but they do not give any pressure indications as the formulae only deal in muzzle velocity. My program is quite unique in that it does predict pressures.
