Tom,

I have never seen any published ballistic data or cartridge dimensions for the 9.3x57R/360.
I have discussed this with "Lancaster" from this forum a while ago, he knows a lot and obviously has a good library, but he also had no more information.

So I try not to exceed around 1200 - 1300 bar with my loads, which should be the expected blackpowder /nitro-for-black level.
Using the standard 12.5 gram bullets with Rottweil R901 I went as far as 530 - 540 meters per second muzzle velocity. The ballistic program Quickload says this is within 1300 bar pressure, and I get the German energy limit for hunting roe deer (1000 Joule at 100 meters), but I consider it quite max in my rifle. Similar loads could be done using Vihtavuori N120 or IMR 4198.
For a lighter load with lead bullets I use SR4759, muzzle velocity around 400 m/s.

Regards,
Martin