1. Bullets and broadheads= apples to oranges!
2. Complete pass-through with a bullet may OR may not be better than a bullet expending all of its energy inside the animal! With the right type of bullet, and velocity for the animal being hunted, one is no deadlier than the other!
3. Complete pass-through = better blood trail.
4. Most important here is....
short of a spinal, or brain hit, there IS NO guarantee of a drop-dead hit with just about any cartridge that you'd care to hunt with! (A square, double shoulder hit gives a great percentage of drop dead hits, but why waste that much good meat!!!???)