Looking at the old posts and a lot of comments arguing different points, which often didn't match anyway!

Peter was arguing, a 10.75x68 using modern powders could match the OLD .404J ballistics with a 400 gr projectile ie 400 gr at 2150 fps.

Others were arguing a 10.75x68 could not MATCH the .404J ballistics as the case is unquestionably bigger!

Ha ha, BOTH arguments are correct.

Today it might be possible to get 2300 fps from the modern reloaded .404J. I don't have one today so don't know.

As for the 10.75x68 not being suitable for big game today (or being considered "marginal"), if the .404J was suitable a hundred years ago (or whatever) and a sensibly modern reloaded 10.75x68 can do the same ballistics today, I don't see why buffalo, lion, even elephant have gotten tougher today.

Also the increasingly popular .450/400 gives similar ballistics ie 400 gr - 2050 to 2150 fps velocity range, so is this cartridge also marginal on DG? No, otherwise my .375 300 gr at 2300 fps should be bouncing off the beasts.

The main "historical" complaint about the 10.75x68 was the too softly jacketed bullet - 347 gr - in the original "vintage" loadings.

JMO.