Sure, theoretically a cartridge 10,75x68 loaded with an 400gr bullet at 2100 fps and more can perform the same as an cartridge 404 Jeffery, but so far I am waiting for someone to do it and to reach it, despite the small powder capacity of this cartridge. Unfortunately, it is only talked about and nobody tells of his successes.

The reason why I believe that it is not possible to get more potential out of this cartridge. The RWS company gives loading data for the 10,75x68 cartridge and a 400 gr bullet, but with the maximum load, 2000 fps at the muzzle is hardly achieved.

I really don't know why people try to improve such obsolete cartridges when one have nowadays so many good cartridges available for hunting big game.