For North America the 270win is great it kills deer elk and moose just fine. For the big bears the 30-06 has killed more bears than any other cartridge and it most likely will continue to do so for a long time. I would prefer the 35whelen loaded with 250gr partitions over the 30-06. Remember the 222rem has killed a slew of polar bears! In a sako it was the prefered native polar bear cartridge.

I this world of new and newer guns Anyone with a 222rem, 270win, and a 35whelen can be very well fitted for any North American game. Through in a 22lr and a 12ga and you pretty much complete.