Competition Electronics ProChrono

Speed is a number. Guessing is how groups fall apart.

ProChrono is built on a design that has been measuring projectile speed since 1985, for firearms, shotguns, archery, airguns, and paintball.

Shot Clock: Updated circuitry uses a faster internal shot clock, with rated accuracy of plus or minus 0.5 percent or better. You are proving a load, not hoping it.

String Memory: The system stores up to 9 strings of up to 99 shots each. You shoot a string at the bench, then you read individual velocities, high, low, average, extreme spread, and standard deviation.

Bluetooth Link: On-board Bluetooth pairs with free apps for iOS, Android, Kindle, PC, and Mac. The data leaves the unit instead of living only on a small screen.

Sensing Range: Velocity range is 20 to 9,999 fps. The sensing system is made for varied light and varied projectiles. Indoor use is supported with the optional indoor lighting system.

Power And Size: A replaceable 9-volt alkaline battery is required and not included, with 20 plus hours of operation listed. The unit measures 16 by 4 by 3 1/4 inches. A 2-year warranty covers defects in material and workmanship.

Know the number before you trust the load.