Phil, thanks for responding to your own article.

I think it is a no brainer a .458 Win Mag is an ideal specialist cartridge for brown bear. Anything capable of downing an elephant should work on anything else. But perhaps a specialist cartridge for bear and for the guide? Would one choose a .458 for moose, elk, caribou?

Phil, what projectiles would you choose for bear in a.458, .416,375,9.3?

A reason the .400s and .375s exist is the versatility. And less recoil.

And the 9.3x62 has got to be one of the most versatile medium bores of modern times. It fits in the group of great cartridges, the .318 aWR, the .350s, the .338s, other 9.3s, .360s, and .375s. All using heavy SD bullets in the 250 gr to 300 gr range.

My comments from my "vast" North American hunting experience of zero! ChatGPT has nothing on me!