Re: How much can temperature affect POI?
The density of the air due to temprature changes cause so little effect on POI I doubt one could accurately measure it. Changes in lighting conditions will cause WAY more POI differences at 100 yards then temprature ever will. Even out to 300 yards where I keep my rifles zeroed, I have never detected a POI change in different temps. Lighting yes, temps no.
As you probably know, when you increase the distance, that rule is out.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.