I've used both mechanical and fixed. My expierences with fixed left a lot to be desired with a wounded deer i never found, i managed to find 8 spots of blood over 400 yards from the shot and that was it. The other draw back of fixed I could not get them to fly right after 20 yards. Since then i have switced to the Spitfire expandables. Of the four deer i shot the furthest went 200 yards. I shot two at an angle and don't see with this broadhead how it would deflect off an animal that is quarting unless it was standing strait away. Me personally I will continue to use my Spitfire mechanicals.