I’ve seen a few dozen elk killed. With calibers from .224 to magnum 30s. I have never seen a bad result that was due to anything but poor shooting. In no case have I seen any indication that a little bit more diameter, weight, or speed would have made any difference at all in the outcome.

Majority of my experience is with bulls and many if not most of them shot with 270s. Shoot them where it counts with a bullet that will penetrate and don’t sweat the rest.