"In the manual they show a table giving the pressure of the 3 1/2 drams DuPont Bulk Smokeless pushing 1 1/4 ounces of #6 shot as 11,700 psi, with 3 1/2 drams of Schultze 11,800 psi, and the same load pushed by 28-grains of Ballistite at 12,600 psi!! Velocities were all given over 40 yards, not the muzzle velocity figures we are use to seeing today. The DuPont bulk gave 943 fps, the Schultze gave 941 fps, and the Ballistite 966 fps. Meanwhile 40 grains of their DuPont Oval gave that 1 1/4 ounce of #6 shot a velocity of 981 fps with a pressure of only 9,400 psi."
Dave, if these pressures were at 40 yards, what the heck were they at the muzzle?
PSI is PSI no matter what kind of powder you are using, and those figures are higher than what I would want to use in an old gun.
I try to stay in 7500 psi range and around 1050 fps.
Those figures would be close to SAMMI now.
