My last deer i shot I only hit one lung. When i stopped him i thought he was completely broadside but he wasnt. I hit him perfectly for a broadside shot, but since he was slighlty quartering i only got one lung and clipped the stomach. He ran 50 yards and piled up. It all depends on the situation. I would say i got lucky with mine, or maybe i hit more vitals that i didnt see when i gutted him. I waited an hour with mine even though i saw him go down, and i still knocked an arrow just in case.