Do you really think the heart or lungs of a deer really know if it just had a hole punched thru it with a broadhead or a bullet? A shot to the vitals is a shot to the vitals and will put a deer down 100% of the time, no matter what was the cause. With the cutting diameter of some of todays heads, they'd leave a bigger hole than a bullet. You must be using a huge magnum overkill firearm that knocks the deer off of its feel everytime and leaves a softball size exit wound