Garmin Xero C1The Labradar LX chronograph delivers the precise accuracy you'd expect from a radar based system, setting it apart from traditional optical chronographs. And the Garmin Xero C1 is the same, except One key advantage the Labradar LX offers over devices like the Garmin Xero C1 is its ability to provide ballistic coefficient (BC) data. The ballistic coefficient is a critical component in ballistics because it quantifies how efficiently a bullet overcomes