Good timing brother. We just discussed proof with Mullerite, and your example, here
https://www.shotgunworld.com/thread...sxs.591046/?post_id=5344288#post-5344288 12g Manufacture Liegeoise proved with Mullerite for a maximum service load of 2.70 grams = 41.67 grains = 3 Dr. Eq. (42 grains) with 36 grams shot = 1 1/4 oz. shot.
Mullerite was marketed by
Louis Muller & Cie S.A. des Explosifs de Clermont, Liege in 1899. No. 1 was a Bulk Smokeless; No. 2 a faster burning “33 grain” Bulk powder.
Poudreries Réunies de Belgique acquired Muller & Cie in 1919.
Schoverling & Welles, 2 Murray St., N.Y. were agents for Muller & Cie in 1904
A.A. Schoverling was manager of the Mullerite Gun Club in Newark, N.J. in 1905
