I would recommend the Remington Mountain Rifle as well, chamber in .270, 30-06, or 7mm....either of those calibers will do the trick. I have hunted Wyoming many times. I primarily use a Remington Model 700 in 30-06, but purchased the Remington Mountain Rifle in .270 caliber last year....It worked out great last fall....taking both Antelope and Mule Deer. Mule Deer was heavy 5 X 5 shot at 200 yds hit in shoulder, dropped in his tracks....and antelope shot at just over 300 yds, also dropped in his tracks. I would recommend the Remington Mountain Rifle.....caliber is a matter of preference, but .270, 30-06, or 7mm will certainly do the trick for you. As far as ammo choice...I find the Federal Premiums in 165 gr BTSP shoot best out of my 30-06, and the Winchester 130 gr power points shot best out of .270....FYI...for whats its worth.