I've got a stainless all-weather Ruger M77 but don't really need it. If you're hunting in Canada, and (like me) Wisconsin where it gets really cold you aren't going to be standing outside. You're going to be in a warm, blind with maybe even a propane heater.

There aren't clothes made that will keep you warm in some of the weather we get here so you'll be inside something and so will your gun.