Rangefinding including ballistic metering

An apparatus including electronics to perform one or more operations to determine one or more projectile characteristics, including at least projectile velocity of a projectile launched to a target, using collected optical information or collected audio information, the apparatus comprising:

• a sensor system coupled to the electronics, the sensor system to generate ranging data and additional data comprising sensor data;
• wherein the ranging data is indicative of range to the target from a launch position, wherein the sensor system comprises a laser rangefinder or another mobile range finding device, and a portion of the collected optical information is collected using an optical receiver associated with the laser rangefinder or the other mobile range finding device;
• and
• one or more additional sensors to identify a time of launch of the projectile, the one or more additional sensors including at least 1) a microphone to collect a portion of the audio information, to identify a time of impact of the projectile on the target, or 2) an impact sensor coupled to an LED or another light near the target, the LED or the other light to produce a portion of the optical information to indicate the time of impact, the produced portion based on a signal generated by the impact sensor;
• the one or more operations to calculate projectile time of flight using the time of launch and the time of impact, wherein the one or more projectile characteristics are determined, based at least in part on, the calculated projectile time of flight.