66 votes for the 30/06...
Of course the over all range is from 22 rimfire to 50 caliber BMG...
I've only seen 17 polar bears at the Church Hill Polar Bear prison,,, I'd think twice before pulling a trigger on those that were there... They ranged from 350 to 650 lbs...
They are not friendly to humans,,, they are fairly smart at sneaking up to humans,,, and they normally strike fast with lots of power...
My good friend encountered a fairly young Grizzly in the Rocky Mountain Range of Western Canada,,, 30 feet between him and this Bear with a @zz as wide as a 1956 Chevy tail-gate...
He was holding onto a loaded 7mm Remington Mag,,, it was the only time in his life that he felt out gunned even though he had killed lots of black bears,,, Elk and Moose... Strange that he thought this on that encounter,,, I'm sure it was 1 big Grizzly...
He was at that point of no return,,, if the Grizzly took one slight step it was trigger time with as many as he could get off before being mauled to death...
The Grizzly decided to walk sideways to him instead of proceeding forward,,, he said it was a very eerie feeling indeed...
He harvested a good size Grizzly with a bow from a tree stand 10 years before that encounter,,, that was a pretty scary feeling climbing out of the tree stand 1 hour after the hit by the arrow... He knew he got a good shot on it to its boiler room,,, but even then I can understand what feeling in some ways...
Of course this is only part of the bear stories,,, lots of folks forget that more humans here in North America have been killed or maimed by Moose then by Bears...
Moose are dangerous,,, not only the Bulls,,,.the Kows can cause the same damage with the hooves... We call it strange encounters of the furry kind...
I sure don't know what it takes,,, I would think that the 30/06 would be enough,,, but,,, would I chance it to find out...
I can't say I do since I haven't been in that situation,,, nor would I want to find out...
Face to face when a person least expects it really gets a person thinking,,, is what we have in hand enough to save our selves """if""" things go south...
I'm game to not finding out...
Cheers from the North