1893 William Read & Sons catalog
"Regulated for 45 to 48 grains Schultze or similar Nitro powders, and 1 1/4 oz. Shot" would be 3 1/4 - 3 1/2 Dr. Eq.; the usual turn-of-the-century Live Bird load



I don't know the composition of "Scott's Special Steel" but it was very likely Siemens-Martin steel at that time.