Ok you are sighted in with your scoped rifle and ready for your hunt. Are you really ready? I was out deer hunting locally with my scoped muzzleloader using an older scope I had in the closet. It was late September when my older scope was set up. It worked great at the range at 72 degrees. But on my local hunt, it was cold and raining/snowing.  I looked through the scope when I was on my stand and saw fog in the scope. Figuring I got the scope glass wet, I wiped the glass but it was still foggy.  As it turns out the scope had lost its gas filling.

So I am going on another cold weather hunt but way more expensive, with an older scope.

What to do?

I put my scope in the refrigerator for a few hours, months ahead of time. You should have a clear view through your scope. If not you need to contact your scope manufacturer as many scopes have  lifetime warranties. No fridge, or the scope is already mounted? Use ice cubes in a plastic bag around the scope to mimic the outdoor temperature.  

Give that a try…

Good Hunting!