Armorpenetration with an arrow, filmed at 420fps

Rattanbow, 40#@27", 440grain arrows, 1mm steel plate

[@WolfTheMadMan]

It's not that hard to get an arrow with an aggressive tip to penetrate steel. Where the difficulty comes into play is when you try to penetrate a rounded breast plate or helmet made of steel and due to the rounded surface area, the shot will almost always be deflected.