As i've never understood the concept of a rifle for this area, and a rifle for that area. I decided long time ago, that to be the best "game shot" i could be, would be to pick a "go to gun", and use it for all of my big game hunting. So that's exactly what i've been doing for a long long time now. That doesn't mean that i don't "ever" hunt with a different gun, but when i want to have my "best" chance of putting meat in my freezer, i pick up my "go to gun", because i by far know it best.
If you choose wisely, you can hunt in every condition with one gun, from deep woods, to shooting across fields, and know that your choise will work "perfectly" in both conditions, and everything inbetween too.
The "big thing" is to "practise" with your go to gun, and get good enough with it to know where it shoots, at all ranges and to know that YOU can make those shots under hunting conditions.
You will never be your best, switching from one rifle/cartridge to another all the time, trying to match this or that gun/cartridge, to "that" days conditions.
In the last 25 plus years, i've taken moose and bear on down to deer, javolina and everything inbetween with the same gun/cartridge, and it's worked perfectly on everything i've shot with it.
I think many hunters are just always wanting something NEW, instead of getting their BEST with what they already own.
DM