Welcome - you've come to the right place for a whole world of conflicting opinions, one where 800 yard running neck shots are considered routine and anything less than a .338 Lapua or Macaroni Super-Whiz-Bang-magnum is too small for anything but rats! Bella Coola. Wow, have we had some fun down there over the years. I really miss those trips.....
To answer your question, a .30-06. Period. One that shoots straight with a good 180 grain bullet = dead moose.
Enjoy the site! This place is a hoot.......sb