RE: K.E.
Aurthur, I couldn't agree with you more but that's the only figures available "per study", and I'd bet more than not it's all about compounds. You and I both know that a recurve/longbow shooting a heavy wooden arrow of the past not only killed deer but probably every bit or more efficiently than todays technological advancements and light arrows....
Like you said, my earlier study was true, it'd be near impossible to pass thru and animal with less and we know that is not true but like I said, it's about shot placement....and then woodsmanship.