Vit. Manual:
9.3x57 - 255gr. Sako Bullet. 50.9gr. N140 - 2,260fps 3770PSI CIP

From my own 9.3x57 data when working up loads for a model 96 Husqvarna 23.4" bl.necked up 8x57 RP brass. WLR primer

270gr. Speer 48.0gr. H335 - 1,978fps Very Mild .0000" web expansion
270gr. Speer 48.0gr. H4895 - 2,268fps Case web expansion .0000" mild
270gr. Speer 50.0gr. BLC2 - 2,111fps Very Mild .0000" web Exp.
270gr. Speer 52.0gr. BLC2 - 2,300fps .001" web expansion mild
300gr. Hornady (resized) RN 45.0gr. H4895 2,170fps .0001 to .0002" exp. Mild

I would use this data in any 9.5x57 or 9.5x57 without hesitation, starting a grain or 2 lower, of course.

Note in the ctg. description of the 9.5x56Mann. The shoulder diameter is given as .455". THAT my friends is .001" larger than the same case if Ackley IMP, which is .454". The shoulder angle of course, is standard, not Ackley'd. 35 to 40degrees.
The picture of the loaded round is not a fireformed case and looks closer to a 9.3x57, with it's smaller shoulder.
If the rifle in question for this thread does indeed have a .455" shoulder, the data I showed will produce less pressure and velocities than if used in a simply necked up 9.3x57 (which should also be lower pressure and vel. t0o start with)