Anybody ever hunt deer with their longbow? I have a bow that is 69 pounds at 28 inches draw. I have been messing around with it and am finally getting what could be called a group at 15 yards. I clocked my arrow at 140 ft per second. Is that fast enough to get full penetration up close at 20 yards or less? How do you determine the foot pounds of Kinetic energey at different distances? I understand it takes approximately 40 foot pounds of energy at the deer to (on average) to get complete penetration. For elk this number goes up to 50 foot pounds. Any info? Comments welcome?