If you are going to consider it a "all around rifle" for both deer and Elk. You would be better off on taking the 7mm mag. Better bullet selection for elk at a distance.
I am going to be honest with you. In several posts you keep mentioning long distance shooting from 700 to now a 1000 yards.
The fact that you have to ask so many questions about calibers to do that shooting tells me you are not experienced enough to even consider a 500 yard shot, let along one out to 1000 yards.
Get your feet back on earth and get a good caliber hunting rifle and get a lot of experience shooting and you will figure out most of the answers to the questions you have been asking.
Do not believe all that hype you see on hunting shows, they edit out the bad shots and only show you the good shots. Those long shots are not as easy as they make them out to be. You end up just losing a wounded animal to die a slow death and rot away.
RELH