Ah, I did find the term >>Poudre Vive Unique<< in a reference to the 1924 Rules..... So indeed, the Smokeless Powder @ 1924 was named >>Unique<<. A Maker could request a 2nd Nitro Powder Proof from a choice of available powders but the pressure was not to exceed the Unique Powder Effort.


Hochachtungsvoll,

Raimey
rse