I had thought for years that an arrow stopped rotating once it hit something, especially with a fixed blade head,, Not so! There must be plenty of rotational energy in a speeding arrow to do what it does in my solid foam back stop. Bullets blow up on impact sometimes due to the very high rotational speeds, if they are too lightly constructed for the speeds they are loaded to. This is a desirable trait with prairie dog bullets. I used to do a LOT of varmint hunting and reloading and until you do,, it's hard to beleive just what that little 25 or 50 grain pill will do

I wonder how many inch pounds of torque an arrow expends into a target??