Sheesh!! The reason so many have moved over to the "dark side" [Magnums] is because game animals have evolved into armor plated, mutants that simply will not die if shot with anything less than a 338 sooper magnum. Reading much literature aimed at the hunter seems to reinforce this thinking, and I cannot imagine why. I have hunted for over 50 years, and while I do own a couple of magnums, they have actually travelled very few miles in comparison to regular chamberings. The 6mm Remington, 6.5x55, 270 Winchester 7x57, 300 Savage, 308 Winchester, 30-06, 303 British and 8x57 have all worked just fine at ranges that varied from practically point blank out to 500+ yards.
I cannot imagine hunting thin-skinned NA game and feeling undergunned with a 308 Winchester. Regards, Eagleye.