If you were a little off center and hit the rounded edge, that arrow could have ricocheted around like a bullet.
The 2+ lbs heavy pans are a real challenge, for sure.Me and you know that: whatever xbow cannot penetrate steel.
During my military service I've been told a steel-core bullet from a AK47 penetrates 7mm at a 30° angle. We were never allowed to try it, though ...I remenber my father's shotgun. It cannot penetrate steel either. Only his Mauser 50 caliber can