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MS 9x56
The .358 Win, 9x56, 9x57, 9.3x57, 9.5x57 all IMO get short shrift first by being compared with the 9.3x62 and .35 Whelen in modern loadings and even by comparison w/ the .375 H&H. I suspect a lot of that among those who should be more knowledgeable has to do w/ the belittlement more or less by Taylor and others with Africa experience (or...who dream of Africa experience) who point to the (often-uneeded) need for effectiveness against the heaviest and most dangerous of game. Add the fact that they are not long range cartridges which (for example, here in some areas where logging practices have stretched the possible range of shots) are all such the rage now and the folks have just steered clear of them.
Fact is tho that all are solid 200 meter deer, elk, black bear and boar rounds, produce significantly less recoil than the modern-loaded 9.3x62 and thus are easy to shoot and very few are in need of a caliber for hippo et al, and if such is a need, other calibers are readily available.
While I no longer own one, if I was picking one round for our deer and elk here in north Idaho the 9.3x57 would be a tough one to ignore. Easy to shoot and very effective as I experienced when I did use a couple of them on such game.
I've often thought of getting a .358 in the Browning BLR. Would be hard to beat for most of my conditions.