Antler Eater.......I'll one up you.
The most damage (as far as entry and exit wound size)I've seen was a doe I shot with a Rocket Hammerhead 4L.
In reality, I have seen very little difference in results with any of the med to larger cut mechs with respect to distance traveled after the shot......all very short trails.

It only makes sense that the head that hit vitals with the largest cutting diameter is going to do the most damage, however heads of this style are appropriate to use for a relatively small percentage of bowhunters.