Hard to beat the versatility of the 7mm Rem Mag, but a 30-06 would do just as good at the ranges you're shooting, and you could use heavier bullets (180gr would be great) if you wanted to for the elk and bears. I own both calibers and have killed elk using both with ease. I suppose a 270 would work good too, I'm just not much of a 270 fan since it shoots smaller bullets than the 7mm and 30-06 with less energy.