Best rifle caliber for western hunting?

There is no best caliber. There are many good ones, depending upon how you hunt. If you don't shoot over, say 300 yards, a 7-08 or 308 is fine. If you're one who will walk 15 miles in a day looking for elk, the 10 lb magnum is a bad idea. Likewise, if you're taking 900 yard shots, you'll want one of the modern long range calibers. For me, a 270, 270 Wby or 300 WSM is plenty but I don't shoot past 500.
A .308 will do everything a .270 will do at about the same distance - assuming quality ammo. I have rifles of both calibers and like both. Thow .30-06 into the discussion with these calibers. All will do the job on elk and anything smaller out to 500 yards, and honestly a lot of hunters have no business taking shots at animals beyond 500 yards in the field. Both are great rounds with lots of options available and are affordable to shoot. Both have very manageable recoil which lends to people shooting/practicing more. My personal opinion is, if I can't get closer that 500 yards, that's on me. And I prefer not to rely on a bigger caliber rifle to make up for what I can't do as a hunter. Just my opinion for myself. By all means, others should buy what guns they want and enjoy!
 
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