Rocky Revolutions, Shot 4 deer with them, on 2 of the deer they worked just fine. The other 2 were hits at close range (10 yards and under), and from what I could ascertain neither broadhead ever opened. Both arrows went thru the deer like hot knives through butter, much faster then Ive seen with other hits, very little blood and no deer.[:' (] I took the one broadhead home and slammed it through thick cardboard several times, couldnt get it to open going thru the cardboard.