If you hit in the vitals, heart, lungs, why is it so important to have a pass thru? It is still going to be dead in a short period of time. Typically a double lung hit with a pass thru will not produce much more of a blood trail. A lung hit is more of a internal bleeding wound. Actually if I was to hunt elk, I would not use any the heads you show, I would use what I do for whitetails, A slicktrick standard four blade fixed. Why? Because I am more concerned with a surgical sharp blade rather then the size of the cut. Additionally, with many years of use I have never had a bad experience and extremely pleased with the broadhead. Now I am not boasting, but have had close to fifty five years bowhunting and have seen tons of broadheads come and go, and they all claim to be the best. You have to make your own choices. Granted elk are tougher then deer, but sometimes even a double lung hit with a 30-06 will act like it was not even hit, but it will still be lethal.