I used to 125 gr. G5 Tekan II's to kill a 10 point at 12 yards. He ran about 35 to 40 yards and crashed hard into the ground. After opening him up, both lungs were completely mangled and there was massive hemmoraging around the chest cavity. The Tekan II cracked a rib when it exited, and traveled at least 20 yards on the past through. The broadhead is still very very sharp.