Well it gets even more complicated
42 grain = 3 Dram Equivalent Bulk Powders“E.C.” No. 1
“Schultze”
Curtis & Harvey “Amberite” (40 grains)
Sporting Smokeless Powder Syn., Ltd “Cannonite Shot-gun” (1897)
Smokeless Powder Co. “S.S.” (Smokeless Shot-gun) (43 grains)
Cooppal & Co. Wetteren, Belgium “Cooppal’s No. 1”
United States Smokeless Powder Co. "Gold Dust"
Dynamit Nobel's Troisdorf Powder Co. "Troisdorf"
American Wood Powder
36 Grain = 3 Dram Equivalent Bulk Powders“E.C.” No. 2 (Improved)
“New Schultze”
DuPont Bulk (36.5 grains)
Hazard Powder Co. "Blue Ribbon" (37 grains)
33 Grain = 3 Dram Equivalent Bulk Powders“New E.C. (Improved) No. 3” (1897, introduced in U.S. in 1904)
Curtis & Harvey “Smokeless Diamond” (1903)
Walsrode Smokeless & Waterproof Gun Powder Co. “Walsrode Gray”
Louis Muller & Cie S.A. “Mullerite No. 2”
Nobel’s Explosive Co. “Empire”
"Cooppal's No. 2" (30 grain = 3 Dr. Eq.)