Im not an Elk hunter being from Bama but I wouldnt hesitate to use a .243. Thinking a .243 is a marginal deer round is silly. A .223 might be marginal but Ive done it. Killed them just as dead as your 300 win mag or whatever bloated caliber you use. Your facts are a little off pal.
Leave him alone guys. He's just a troll trying to get all our goats.