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Not semi-smokeless Raimey
At the beginning of the optional PV in 1891 the specific bulk smokeless with which the gun was proved was specified; "E.C.", "Schultze", and later Mullerite, "New Schultze" and "E.C. No. 2 & 3"
Smokeless “Schultze” was offered by Von Lengerke & Detmold in the U.S. in 1887
The American “E.C.” & “Schultze” Powder Company was established in Oakland, New Jersey by Capt. Money in 1890.



I've seen guns later than 1898 still indicating the powder

"E.C. No. 3" with the stylized lion
“New E.C. (Improved) No. 3” was introduced in U.S. in 1904; likely earlier in Europe and England



Mullerite proved