I' m definatly a double lung guy. A deer is not going far with 2 flat lungs. The first deer I ever shot I hit it in the shoulders. It died but it sure ruined alot of meat. Since that day I have always opted for the lung shot. The furthest I' ve ever tracked a deer is under 50 yards.

On the other sub topic of neck shots, while I have never used one other than a finish off shot, I have seen them effectivly used many many times. I have never seen a deer walk away neck shot.