This is one of the charts from the 1900 catalog listing the Poudre J loads; which I believe to be 15.8 grains/dram equivalent

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12 gauge 3.5 grams = 54 grains = 3.42 Dr. Eq. to 3.8 grams = 58.6 grains = 3.71 Dr. Eq. with 36 grams shot = 1 1/4 oz. - boomer loads
16 gauge 2.5 grams = 38.6 grains = 2.44 Dr. Eq. to 2.8 grams = 43.2 grains = 2.73 Dr. Eq. with 30 grams = 1 oz.
20 gauge 2 grams = 30.9 grains = 2 Dr. Eq. to 2.25 grams = 34.7 grains = 2.2 Dr. Eq. with 26 grams = .92 oz.

Standard charges

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Poudre T I believe is 11.5 grains/dram equivalent

12 gauge 2.4 gram = 37 grain = 3.22 Dr. Eq. to 2.6 grams = 40 grains = 3.48 Dr. Eq. with 1 1/4 oz shot
16 gauge 1.8 gram = 28 grain = 2.43 Dr. Eq. to 2.6 gram = 31 grains = 2.7 Dr. Eq. with 1 oz. shot
20 gauge 1.4 gram = 21.6 grains = 1.88 Dr. Eq. to 1.6 gram = 24.7 grains = 2.15 Dr. Eq. with .92 oz. shot

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