I have owned one of each 9.3X57 & 9.3X62. How ever I have not used them enough to claim expertise.

My opinion FWIW

Both rifles can be loaded to safe 8mm pressures - the old load data is around 50,000 PSI (& not 60,000+ psi that cartridges in the 270 range are loader to.)

Using 232 gr Norma bullets, you would have a great deer caliber up to 250 meters easily. You can get 2400 fps with the 57mm case & 2600 fps with the 62mm case - at low pressures. In a modern action like a CZ 550, Ruger or Winchester you can add 100 - 150 fps.

286 gr bullets will be adequate for African plans game - the 57mm case will give you 2150 fps & the 62mm case should do 2350 fps. This is also good enough for 250 meters.

I am working up loads for my Simson M98 rifle in 9.3X62 - aiming for a max of 2400 fps with 286gr bullets & the 250 gr Nosler & Barnes to 2600 fps. The pressure level Should be slightly higher than the 8mm but less than the 270 etc.

John Barness & Chub Eastman have written great articles on the 9.3s & medium bores (Dec 07) in Rifle & Handloader magazines. How ever these loads are higher pressure for modern rifles & they do up to 2650 fps with 250 gr & 2500 fps with 286 grs bullets.

Happy hunting.