One year-old used only 3 times. The System 89 measures the calibrated ballistic coefficient for each bullet fired. At very long ranges, the shot-to-shot uniformity of the ballistic coefficient becomes even more critical than uniform muzzle velocity. Shooters will also find that uniformity of ballistic coefficient and muzzle velocity is more important than simply looking for the highest velocity and BC. The System 89 measures that uniformity of both muzzle velocity and ballistic coefficient so that you can select the most accurate combination of components.
Optional Leupold laser range finder for additional $375.