If I'm going after a large bear or bison, they're at least potentially dangerous and in the bison's case thick skinned and I'll use a .375 or possibly larger depending on the likely shot distances.
For everything else in North America, I'll take a .264WM or 7mmRM and have something that shoots flatter, penetrates deeper, and has less drag. There's no question that heavy 6.5mm works well on moose and similar - more moose have been shot with the 6.5mm than any other caliber.
Oh, ok. I misunderstood at first like a 6mm or a 40 caliber and up would do anything better. Of course they have their roles too.
But like the 375 you mention the 35 is a true hunter bore for the average range most people hunt like in the northern woods
and with something as simple as necking up a 308 case one has magnum like killing power if needed. Not just for deer for
for defense against dangerous game. In many ways is similar to the 375 for the same capacities. Take the 35 whelen another
super easy and brutal on any game. Either one can shoot very flat to kill medium to large game to 500 yards or to be used
as Brush cartrige with 250-270gr bullets given the proper twist.
Smaller calibers including the 338 federal and popular 30 calibers do not fair so well in thick brush country.
The 358 and 375 are possibly the two last bores that make sense ballistically talking. Of course one can get amazing heavy bullets
in 416 and 50 cal but those are expensive and if dedicated to long range require BMG type cases and actions.
Another advantage of the 35 bore is that one can use popular pistol bullets some in amazing bulk deals. Before the summer I got
3000 bullets from speer TMJ 200gr for 12cents each. The powder in my 35 gunner or the 358 is not that much so for that kind
of investment one gets a huge return.
The 358 winchester will also drive a 160gr cutting edge bullet close to 3000fps from a 22" barrel. It will shoot flatter than the 308
at average distances and while is not for long ranges will show very broad and deep wounding. Almost too much for small deer, hogs
or small bear. But I think the sweet spot is 200gr sp / 225gr partions or a 250gr speer or partition for deep penetration like a large moose or bear.
Some folks enthusiasts of the 9mm, 357 for pistol and lever might find the 358 and/or 35 whelen a perfect caliber for friendly
budget shooting with some of the same bullets and some popular rifle powders.
If one could have only one bore to share all bullets between pistol and rifle the 35 bore would be perfect to share everything across.
One can load some 357 calibers like a 357 mag or max casing not just to shoot the same bullets but also bird loads given some
careful consideration to specialty reloading. Will not be as efficient as the 410 but it can be pumped hotter with lead ball too.
Also amazing subsonic loads up to 310gr penetrators given the proper twist.
The 30 caliber is amazingly versatile too but for pistol they are somewhat restricted and for subsonic or largest game they max out
faster. It only gets better in the long range at much longer distances and even in those situations is questionable for what animal.
The 7mm is hard to beat no matter what objective in terms of recoil vs. ballistics efficiency.
The 6mm and 6.5 are popular for target and small-medium game at modest ranges but it is quickly maxed out for serious game
and not that practical for all terrain thick woods type of cartriges.
So many options with the 35 bore.