I was at first shocked about the - seemingly - rather sizeable discrepancy in powder metering (from 34,6 to 36,4 grains). But then I began to think. ;-)
A standard military powder, like Cordite, Solenite or the German Gewehrblättchenpulver, can never be produced at large in the very same quality and with exactly the same properties, there will always be discrepancies from lot to lot. The military powder manufacturer therefore supplies each production lot with exact loading weights, lot-specific, to be observed by the loading factories.
But the cartridges of which BavarianBrit got several, either loose or on the Breda Mod. 30 MG clips, may have come from very different loading lots and different producers, hence the different powder weights.
Carcano
