I like hammerheads, but got the (not so) bright idea to make some tip over targets out of 2by4's with a 6" by 6" plywood base, they break my trad lights with hammerheads like crazy, must be the twisting action when the target tips. So don't repeat my mistake! I avoid shooting them at targets that might twist or tip. I mostly use the plastic blunts form 3 rivers for pure stumping, they stop really well in grass and brush, as well as judos, and I've never broken an arrow using them on anything, even the accidental rock.