Thanks again to everyone; just trying to understand, and esp. establish the service loads. Courtesy of Raimey

16g proved with E.C. No. 2 for a service load of 2.60 grams = 40.12 grains = 2 3/4 Dr. Eq. "E.C." or "Schultze" Bulk Smokeless and 30 gram shot = 1.06 oz.



12g ML likely proved with Mullerite for a service load of 2.70 grams = 41.67 grains = 3 Dr. Eq. (42 grains) "E.C." or "Schultze" with 36 grams shot = 1 1/4 oz.



"Infallible" Dense Smokeless powder was introduced by L&R in 1900, and 42 grains would be TWICE the 3 Dram Equivalent loading. And we wonder why c. 1900 barrels blew frown



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