So, the 9.3x62 has a bit of recoil... How about on something heavier, maybe a Howa? Old Mark-X? I sooo don't need one, but, I have brass and dies... LOL
Yes, plugging Hodgdons top load for the 9.3x62 with 286gr pills and the top load for 300 WM with 200gr pills into JMB for a 6lb rifle, you're looking at 53 ft-lb vs 50 ft-lb recoil respectively. That's pretty vicious, a heavier rifle would help some, but you can't get away from the fact that recoil is the conservation of momentum, and bullet mass is a much weightier..... factor in that calculation than in KE.
If course you could load the 9.3 down with lighter bullets or lower velocities, but that's true of any cartridge, and in this case you're just kind of trending back down towards an expensive to shoot .30-06 with a much worse trajectory. Those were my thoughts anyway, when I stopped playing with the 35 Whelen and 9.3. If I were going to play with fat bullet .30-06s again, I do believe It'd be the .338-06, for all the excellent bullet options.