He hit the leg bone and broke it into pieces the put a perfect star in the heart still this arrow had enough energy to fall out the opposite side as the deer ran away.
If he was shooting Spitfires I don't think he wouldn't gotten any penetration.
that is the down side to a 1.5 inch cut broadhead, the heart is meaty and offers a lot of resistance to the braodhead, the larger the cut the more resistance the broadhead feels. will KE energy in the 60 ft lb range it, at 20 yards, 1.5 inch cut broadhead would have a tuff time passing through.
with a smaller head your chances of a pass through get better.
I once used a set up with 56 ft lbs of Kinentic energy. With a 1 1/4 inch cut I passed through the heart at 15 yards however, when I shot the deer at 27 yards through the heart I did not get a pass through.
All these things should be taken into consideration when you choose how large of broadhead to use.
I limit my size to 1 1/4 inch cut cause that's all the bigger I need, that's all the bigger anyone needs for that matter..
anything larger you willtend to open up the pentration issue,can of worms.