I am still floundering - for sure the 338 Win. Mag. by all info I have found is a good round gor elk. I am headed on my first, and probably only, elk hunt in 2014. I have a 308 Win., 30.06 Spr., 300 Win. Mag. and 338 WIn. Mag. All shoot great and I am comfortable using any of these. I hunt white tail deer a lot and have uses the 308 Win. rifle that I have (Styer Pro Hunter Mountain) for many, many years. My delimma is which should I take on the elk hunt! All have either Swarovski or Ziess glass, excellent riggers, and are very accurate. I am leaning towards the 338 Win. simply for the sake of it being the hardest hitter of the 4. But man I love that 308 Win. !!