Evan-03.........I hunt elk primarily with one of 3 rifles in the .338 mag catagory. I have found the .338 caliber to have more authority in downing big game animals the size of an elk. Those .338 model 70 Winchester are solid 400 yard elk guns for the high country out west.
The 225 grain premium bullet I use will penetrate the vitals from almost any angle a hunter might have in a shooting situation. It does more terminal damage on the inside as well as I have noticed over the past years using the .338 magnum caliber.
There is also more physical evidence of the elk being hit buy those .338 caliber 225 grain bullets verses a .270, 280 or 30 caliber bullet, even out of a 300 Win mag. It simply smacks em a lot harder, like the "Hammer Of Thor"