Muzzle energy is calculated by the formula PF=MV/1000 (19.76 for Metric), where: M is bullet mass in grains or grams, 0 < M < 2000.00 (~130 for Metric);* V is the bullet velocity in ft/sec or m/sec, 0 < V < 5000.00 (~1520 for Metric);*
* - Only first two decimal digits are used.