When selecting a rifle for hunting and especially Elk hunting I would select a proven field gun with high availability of off the shelf ammunition. When traveling long distances to hunting camp no matter the location often times unforeseen difficulties can arise and bite us in the ***. You get to camp and you find that you left the ammo home. You get to camp and on your last hunt you unknowingly knocked your scope off and there was no time to shoot before traveling to this camp. No matter what problem arises you want to make sure that ammunition would be available, no matter where you hunt, even though you may have to travel 100 miles to the closest town. When I am asked this question my answer is always caliber first firearm selection second.