This past weekend, I was doing a warbow demo for a small group of medieval re-enactors. Besides doing the usual flight shooting with a mark set at 200 yards, I also had the opportunity to display some penetration ability.
I had a helm to shoot at, and an exterior metal door. The door was: metal, wood, foam core, wood, metal. I'm not sure what the metal gauge was on the door... probably 20 gauge maybe? I set these close... only 20 yards.
I was shooting my 100# tri-lam, with some heavy arrows (80 grams) with hand forged armor piercing heads. I got some of the target archers to shoot at the door... their arrows just bounced off. Mine? Complete head penetration. I had to use a ball-peen hammer to tap the arrow back out. I had complete penetratiuon on the helm as well... the head peeled back a hole like a banana, and penetrated to the shaft. Needless to say, everyone couldn't believe the power of the warbow!
Pictures speak for themselves.