I don't own one "yet". But it is built on a Mauser 98 action and made by a reputable gun maker. Sounds like a winning combo to me. Also it is one of the few guns out there being made in 338 Federal right now.
My two rugers were very accurate. I had a Mark II 300 Winmag and a Hawkeye 338 Winmag. They both shot every load I tryed under an inch. The 338 would frequently shoot 1/2" or under.
For me, they have been a great rifle and I think my favorite rifles.
My new CZ may become my new favorite once I get a scope on it and see what it's true accuracy is.
I don't think you can go wrong with Ruger
Moose calling can get confusing to some, but cow calling is your main tool when moose hunting. If you go out and buy moose calls I would say you're wasting your money unless it is the birch bark cone. I find most store bought moose calls sounding worse than puffing a grunt your hands to make the call. You can roll up a piece of birch bark in a cone shape to use as a call and spend your money on a video that teaches you the basics of a cow call. A milk jug or a coffee can with a hole and a rope...