From what i know - Kestrel 5700 Elite Weather Meter with Applied Ballistics with LiNK

I picked this up as I realized, from a 12" drop in a shot at 320yds while hunting, from a combination of weather and temperature sensitive powder, that I needed to change to a more stable powder and have some help on the weather. I can even tell with 60yd shots with my .22lr that weather would change POI a little. I'm hoping this cures it. The stable powder has helped immensely and I'm sure this will help too.

A buddy of mine that does long distance shooting swears by him and others he shoots with, this is a huge increase of great cold bore shots with weather changes to hit the targets.