Mechanicals fly great BUT! If anyone has hunted in the snow or frezzing rain those blades are frozen shut or you hit that off shoulder and dont know that you broke part or all of that blade off and go to guttin and find it the hardway or forget to put new o-rings on the next season and wonder why the head opened in flight. Those are just some of the problems I've had with them. Now I shoot Muzzy 4 blade 100gr or 100gr shuttle T which do unspeakable damage and I dont have to collect those tiny little rubberbands anymore.