I have owned my 300 whby for 6 years now and have killed 5 elk with it. All the animals where one shot kills from ranges of 80 yds to 328 yds. I use a 180 grain weatherby factory barnes x bullet. The ballastics for this combo are fantastic. It is a very flat shooting gun for a magnum rifle that also delievers good down range energy.
You wouldnt go wrong with owning that gun.
The 300 Weatherby definitely has the edge for the type of hunting you indicate. Your effective range will be further with it than the 338 win mag, and it is still going to do just fine on moose at closer ranges.
If you shoot it well, there's not much you can't do with it on this continent.
Elk have been killed close to roads where they could be loaded whole into the bed of a pickup. But it doesn't happen often and I'm not sure that is the experience that I long for. The type of elk hunting that I prefer requires rigorous physical exertion that can cripple someone who is not in shape. Being a college hockey player I have to be in at least fair physical condition most of the year but when one of my buddies got back from the Navy Seals he changed the way I think about physical...