I do a lot of hunting in sub zero weather. Does this present a problem dialing in elvation? Are there thing that one should be aware of to prevent problems?
I would think that Len is correct on the parallax thing, more so than elevation or windage. The grease they seal inside the turrets could get thick and cause them to lag at very cold temps. I've never had that problem, but it doesn't get colder than the tens here usually.