Makes long range shooting simple. Enter your ballistic info for all your rifles then point and shoot to get instant dial-ups that take all your environmental perimeters into consideration except wind speed. There is a windage value given in the calculation that you can work back to your wind gauge velocities. Takes temperature, Humidity, Barometric pressure, angle etc. Maximum ranging capability. 2286 metres. Maximum ballistic calculations. 1280 metres. This is the latest version and ranges in metres. Ballistics in MOA or MILLs. for more info go to WWW.GSEVEN.COM