The entire 360 family is confusing. The 360 2 1/4 BPE and the 9.3x57R(360) were black powder cartridges in essentially the same case so used BP (or for the Brit, Nitro for BP) loaded to max 28,000 PSI. The 360 2 1/4 Nitro Express used the same brass but was loaded to 34,000 PSI so for newer rifles only and marked for Nitro. The 360 #2 Nitro Express was a much larger in diameter 3 inch case with nearly twice the powder capacity and Nitro only. To add confusion, the 400-360 NE used brass in between the two in diameter and 2 3/4 inches long for Nitro only. I load my 9.3x57R(360) rifles with nitro powder at nitro for black powder levels and I would guess that the Germans did also. Early German and Swedish loads would have been BP. Husqvarna made rolling block rifles in that caliber until 1915 and recommended loads from 50 to 54 grains of BP with bullets from 160 to 195 grains in weight.
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