Despite unsuccessfully searching for Pete Mikalajunas' thread from long ago, I think I've figured out the French l’Administration des Poudres et Salpêtres sporting powder strengths
Semi-smokeless Poudre J - 15.8 grains/dram = 47.4 grains = 3 Dr. Eq.
Semi-smokeless Poudre M - 12.76 grains/dram = 38.3 grains = 3 Dr. Eq.
Poudre T Pyroxylée Sans Fumé (introduced in 1899) - 11.5 grains/dram = 34.5 grains = 3 Dr. Eq.
For comparison
42 grain = 3 Dram Equivalent Bulk Powders
“E.C.” No. 1
“Schultze”
DuPont Bulk (40 gr.)
Curtis & Harvey “Amberite” (40 gr. on introduction - later 42 gr.)
Sporting Smokeless Powder Syn., Ltd “Cannonite Shot-gun”
Smokeless Powder Co. “S.S.” (Smokeless Shot-gun) (43 grains)
Cooppal & Co. “Cooppal’s No. 1”
Louis Muller & Cie S.A. “Mullerite No. 1”
United States Smokeless Powder Co. “Gold Dust”
Dynamit Nobel’s Troisdorf Powder Co. “Troisdorf” (41.5 grains)
American Wood Powder
“J.B.” Powder
36 Grain = 3 Dram Equivalent Bulk Powders
New DuPont Bulk (37 grains)
Laflin & Rand Bulk (37 grains)
Hazard Powder Co. “Blue Ribbon” (37 grains)
“E.C.” No. 2 (Improved)
“New Schultze”
33 Grain = 3 Dram Equivalent Bulk Powders
“New E.C. (Improved) No. 3” (introduced in U.S. in 1904)
Curtis’s & Harvey “Diamond Smokeless” (1903)
Red Star (New Explosives Co., Stowmarket)
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 grains = 3 Dr. Eq.)
French proof pressures follow
