I've used a .308 rifle for much of my hunting in Canada for the past 50 years. Instead of the USA habit of comparing it with the old .30-06 and thinking it's "not quite as good", Canadians often compare the .308 with our old .303 British and think of it as a "little bit better". However I don't believe there is an observable difference in effectiveness between those three in the field during actual hunting conditions. From the largest moose on down to the lightest pronghorn antelope, I've never found my .308 rifles lacking. I've tried many other cartridges, and keep coming back to the .308 as the most practical, capable, efficient, easy to shoot accurately, and generally useful cartridge for most of our hunting.