I recently got to taking and logging air pressure when I do a range session, because I have acquired some hunting in the mountains and will be taking shots with 6000 feet more elevation than where I normally zero and shoot. So I figure that if I can track the differences in the cold bore POI with pressure changes I can use that info for my high altitude shots. So do I need to pay more attention to relative or absolute pressure? My Skywatch Xplorer4 gives both, and it was only recently that I discovered the difference. Now, if your logging work is good, I suppose it shouldn't make any difference, because it calculates the relative air pressure by taking the absolute then factoring in the altitude, but that is also pressure based, and here is where I start to have doubts in the accuracy of using relative. With absolute you should have an actual environmental value, and I should be able to set up an air pressure to POI log, which should also translate into altitude, no?