Of the four deer I killed this year with my Tac 15
, three shots were pass throughs that went through heart/lungs and buried 6-8 inches into the ground.
The fourth shot was a quartering away shot that entered high on the right hip and exited low on the left shoulder of a large doe. She turned to look at me and bowed her body as the arrow went through her. Basically the arrow went diagonally through the length of the body and broke in half when the deer ran thru a brush pile. Half of the shaft with the fletching was found inside the body cavity, the half with the broadhead was lying on the ground by the limb she hit.
I used Montec CS three blade broadheads with 1-1/16" cutting diameter and I agree with Super 91 about blowing through anything in North America.