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Back on p. 8 Ken

Curtis’s & Harvey “Diamond Smokeless” (introduced in 1903) and Nobel’s Explosive Co.'s “Empire” were both 11 grains/dram equivalent
26 grains = 2.36 Dr. Eq
28 grains = 2.55 Dr. Eq.

The standard "light" 12g turn-of-the-century loading was 1 oz. with 40 grains of 14 gr./dram eq. "Schultze" or "E.C." = slightly more than 2 3/4 Dr. Eq.

From 1912 Curtis & Harvey’s Smokeless Diamond 12g 2 1/2” case 33 gr. (3 Dram) 1 oz. = 8,288 psi so 2.55 Dr. Eq. would be less than 8000 psi

Burrard reported 12g 2” 7/8 oz. 2.36 Dr. Eq. standard service at 6,440 psi