This powder is the small brown tubes with holes through the center. The ammo had steel instead of tombac/gilding so sure to be WW2 production and so I believe it to be Solenite. The averaged out load was 36.3 grains over 15 cartridges. WMH.
35.8
35.4
35.9
35.3
34.9
35.5
36.1
36.4
35.4
7.2 my mistake measuring
59.3 my mistake measuring
34.6
35.1
35.6
35.1