We will look at finding kinetic energy. Kinetic energy uses Mass and Velocity.
Kinetic Energy (KE) = 1/2 X Mass X Velocity squared.
Mass is the same formula as with Muzzle Velocity. Velocity is in feet per second.
If BW = 180 grains, M = .82 If velocity (V) = 550 V squared = 302500 (You just take 550 X 550.)
KE = 1/2 X .82 X 302500 therefore KE = 124025 foot-pounds