If you are talking Whitetails I think you guys are getting carried away. I simply does not take that much energy to pass threw them. You DO NOT need heavy arrows either. The only advantage to a heavy arrow is a QUIETER BOW and MORE forgiving arrow flight.

I was told that my arrows were too light for Moose (380gr) and I was asking for trouble. Well I arrowed a BIG bull Friday evening and achieved a pass threw right behind his shoulder. It was at point blank range(6 yards) so that definitely helped but I think it would still have done the same at 30-40 yards.

I not even sure what speed my bow shoots at I think around 270 fps so My KE would be right around 60 ft lbs...