lol I am looking at a 300 wsm
With either the 180 or 200 gr bullets, this is a good choice for moose from 300-500 yards, if you are capable of accurately placing the bullet in the vitals from field shooting positions. To date I have used the 180 gr AccuBonds (handloads) and Power Points (factory ammo) on moose from my 300 WSM, and both worked just fine.
Mind you, in 38 years of hunting, my longest shot on moose a to date, and the shot was just 220 yards (with a 7mm STW with 160 gr bullet), and my average shot distance is just 132 yards. (And I have taken game ranging from antelope to bison, from 5-475 yards.)
Other good choices would be the 7mm Magnums/PRC with 155-160 gr bullets, or the 338-06/338 Win Mag with 210-215 gr bullets.
Obviously, the larger cartridges with heavier bullets will generate more recoil energy, so your recoil tolerance should be a factor in your final choice selection.
As mentioned above, many various cartridge/bullet combinations will work on moose, as most are not shot at the longer distances you are looking at. I have taken moose with cartridges ranginfrom 6.5x55 with 140 gr bullets, up to the 9.3x62 with 250 gr bullets, out to the 220 yards mentioned above.
Choose a rifle on your chosen chambering that fits you well, and practice with it until you are confident in your ability, and the rifle/scope/ammunition combination that suits your hunting style and environment.
Best of luck in your quest