9.3x62mm is essentially the European answer to the .35 Whelen. The 9.3x62mm benefits by heavier bullets. The heaviest bullet I can find in .358 caliber is 250 grains. The 'heavy' bullet in 9.3mm comes out to 286 grains. (Personally, I think a 275 or 300 grain bullet for the big .35 calibers would be just dandy, but I read a lot of Elmer Keith as a child.) Yes, I understand and agree that would entail a fair recoil. I'm also a 6.5 fan for smaller game than bear or whatever.
Cases are available for reloading several places (PPU, S&B, Hornady, Norma) and reloading is no more complicated than any other large caliber.