My results have been this:

Doe 1-20 yardbroadside shot, hit high and back. Severed the femoral artery and spinal cord. Arrow passed through and buried 6 inches into the ground. Deer dropped and bled out in 20 seconds.

Doe 2-22 yard hard quartering away shot. Arrow entered slightly above the horizontal center of the deer behind the last rib. Front of the arrow exited in front of the far should at the bottom of the chest. Arrow stayed in the deer traveling more than its own length (26")through tissue. The deer ran 85 yards and piled up spraying blood from the ground to 5 feet in the air along the way.

These shots were taken with a 63# Mathews Drenalin with a 27.5" DL and a 422 grain arrow.

Good penetration for me thus far, and I'm a guy that will switch broadheads at the drop of a hat.