I don't have a lot of experience with long range hunting yet but I have shot my .308 at 1,000 yds many times punching paper. The longest shot at an animal with my .308 has been 400 yds. I like the .308 and still use it around here to hunt white tail. After doing the research and reading on this site and others I have decided to go with the 7WSM and the .338 Lapua for long range hunting. I'm still waiting on those guns. I guess it depends on how far you plan to shoot. I feel comfortable hunting with my .308 out to 500 yds at this point but I'd like to have farther reach than that. Just my two cents. I'm not an expert here. Much of this seems to be individual tastes and interests. You came to the right place for advise though.
Gordon