He shoots 60lbs near 400 grain arrow upper 250's fps (What I would consider a MEDIUM power setup these days)......probable in the neighborhood of 55--60 KE
I shot a doe last year with the Aftershock Maniacs and she took about 2 hops, stood up on her back legs and flipped on her back dead. Perfect shot so I would hardly give the head all the credit but it was impressive none the less.