Just aint a real world test. I use & like grim reapers but in my experience they dont zip thru like a fixed blade head. Often the exit isn't where you'd think because things happen as they open. I havent used many mechs but in my limited testing on live deer Tekans come closest to fixed blade performance. I have one reaper left in my quiver & a bunch of Tekans to go thru before I need more. These heads open on newspaper, no other mech I played with comes close to opening that easy.