Winchesters' award winning ballistics calculator is considered the most advanced ballistics calculator on the market, using cutting-edge technology to provide ballistics information for shooters and hunters.The Winchester Ballistics Calculator allows users to choose their type of ammunition and compare up to five different bullet types with easy to read and high-tech ballistic charts and graphs. Enter specific conditions like wind speed and outside temperature, adjust zero marks for sighting in and print out the ballistics of your favorite load.