Since both of these calibers are equal to the task you have outlined, you need to look for the differentiators. Consider wear & tear and possible corrosion when used in your intended environment. I'm pretty sure hunting in Alaska is not like hunting whitetails in the Midwest. For some good insight in this I recommend going to 65Creedmoor.com and ask for help from member 'Cold Trigger Finger'. He lives in Alaska and hunts/shoots quite a bit. He could give some good insight in what to expect when hunting/shooting in Alaska. He also reloads for a variety of firearms and can give you the lowdown on loaded ammo, powder & bullets for whatever you hunt. Probably has some good hunting loads info as well.