When weather ruined my zeros

[Alan]

I zeroed my rifle in 70-degree weather, hunted in 20-degree cold and my point of impact shifted four inches. I didn't know temperature affects zero that much, so I missed my shot and learned an expensive lesson. I now verify zero in conditions similar to when I'll actually be using the gun..

 

[Jacob]

That’s when you learn your zero has seasonal allergies and hates temperature changes.

 

[Virginia 01]

Four inches!!

That wasn't the cold denser air, that was a bad scope mounting. (Unless you were sheep hunting across 500-yard ravines, of course.)