Kinetic Energy Calculator Kinetic Energy is the power potential of the arrow at the target, which is based on the arrow’s weight and speed.Optimal Bow Hunting Kinetic Energy Range:Small Game: 25 ft/lbsMedium Game (Deer, Antelope): 25-41 ft/lbsLarge Game (Elk, Black Bear, Boar): 42-65 ft/lbsBig Game (Cape Buffalo, Grizzly Bear): 65+ ft/lbs