I have been very sucessful shooting out to 850 yards without any help electronically. I recently purchased an ISnipe app and it taught me how weather conditions have such an effect on bullet travel. I have read much about the Kestrel 4500NV lately. Question is, what is included with the Kestrel 4500NV? Does it just show weather conditions alone or does it also provide a ballistics calculator as well. Although I never doubted, I never understood how much technology can help in long range shooting.