Latts,
Nice selection of rifles in your rack -- good job!
Take both of them along, a back up gun in camp never hurts when a major trip and $$$$ are at play.

Since you can shoot both rifles equally well (none of this recoil shyness crapolla)......

IF you' ll be hunting ELK AND DEER at the SAME TIME, then use the 338 WinMag with 250 grain noslers (Federal Premium stuff with Trophy Bonded Bear Claws is fine if you want to step it up a notch), i.e. gear up for the heavier/tougher animal of the two -- elk.

IF you' ll be hunting them seperately, then 7mmRUM for deer (bullet hardly matters -- deer kill easy) and the 338 WinMag (as above) for elk -- don' t kill so easy.

Side note, I' ve had longer shots on deer than I' ve had on elk -- elk are animals of the timber -- we' ve had plenty of shots under 100 yards, my longest 210 yards -- don' t need a screamer for that -- what you do need is a cartridge capable of blazing through to the so called " boiler room" regardless of the angle presented and regardless of what body parts are in the way! Bones? Shoulders? No problem! Coming Through! Elk don' t tend to run 125 yards turn sideways and " pose" while looking back at you like deer do. Therefore the easy " thread it in behind the shoulder" shot that so many deer hunters think they' ll get on an elk may not be there.

Of course someone out there will tell you that all you need is a 30-30 " pop gun" --- go figure .... and so it goes. I like your style better. Good Luck.

Never Go Undergunned (and you' re not with either one of those two),
EKM