To calculate muzzle energy:
Velocity X Velocity X Bullet Weight =
(velocity in feet per second, weight in grs.)
example: a 115 grain bullet traveling at 1300 fps = 431 ft. lbs.
of muzzle energy
* bullet weight should be on ammo box.
If velocity is not on box you may have to visit the manufacture's
Potomac Ltd. / 2 West Dry Creek
Circle, Suite 100 / Littleton, CO 80120
357 S. McCaslin Blvd., Suite 200 / Louisville, CO