Hi RJS,
Oh wish I knew that before, would have saved a bunch of typing
So you are used the 300 WM I take it, nice cartridge
so if it were me for the use you proposing and not a lot of shooting................... well I would be seriously looking at a nice new rifle in .............. yep 300 Winchester Magnum, nice 180 grain bullets and you have a dandy Elk rifle. That load would do of course for Mulies but I might be inclined to use 165 grain bullets for Mule Deer, to my mind the 165 grain is about the best weight for the 300 WM
I would however suggest a bit more shooting time and practice, to my mind the game deserves the best we can do which means a little time spent behind the butt and burning some powder
I don't need much excuse though to shoot
Now as to if you want to look at the new 300 WSM, well that's up to you as I have not even seen one adn have only heard that the cartridges do not feed as nicely as the std .300 WM, perhaps the rifle makers have sorted that little glich out now.
As for the rifles you asked about........... well as I have no experience with them and do not actually know what make they are I cannot comment. As i say have fun and good luck