With a 24" barrel, a 250gr bullet in a .358 Win can be safely pushed to 2400fps and in a .35 Whelen to 2600fps. The 9.3x57 has a case capacity that is the average of the two. In addition it has a slightly larger diameter bullet,(higher volumetric efficiency), and the bullet can be seated farther out in a standard 3.3" Mauser 98 magazine, further increasing powder room.
In a strong bolt action it should be possible to reach 2500fps with a 250gr and 2400fps with a 270gr. at .30-06 pressures. This produces 3400+ ft-lbs of energy at the muzzle making it a very efficient and more than suitable cartridge for all N.A. big game except brown bears. Will find out next spring with dies and chronograph recently purchased. Will reload Norma brass and form cases from 8x57 domestic cases.