Dr. Hause is correct as that voluntary semi-smokeless proof of Schultze powder being some powder different from proof rules & is noted on the side of the scattergun tubes that were sourced from the Schilling forge. The solid projectile tube was also sourced from the Schilling forge. Black would have been something like NGPM 71... which may be seen on muzzleloaders, etc. Why pay for a voluntary proof of another black powder?

Cheers,

Raimey
rse