Miller: The Long Tons to PSI appears to be the simple mathematical conversion rather than (Cp x 1.5) - .5 = TSI, TSI X 2240 = PSI; and we know even that is an estimate.
6.1 X 2240 = 13,664
6.1 X 1.5 = 9.15 - .5 = 8.65 X 2240 = 19,376 ???
For comparison from "Smokeless Shotgun Powders: Their Development, Composition and Ballistic Characteristics" by Wallace H Coxe; E.I. du Pont de Nemours & Co., 1931
Charge was 1 1/4 oz. Dram eq. was not specified but was likely near Maximum. Pressure is expressed in Long Tons.
Using the estimated Lead Crusher Pressure (Cp) conversion to PSI (pound force per square inch) (Cp x 1.5) - .5 = TSI, TSI X 2240 = PSI.
Ballistite maximum pressure at 1” was 4.9 Long Tons = 15,344 psi
Schultze at 1 1/2” was 4.5 Long Tons = 14,000 psi
