I bought a pack of 2 blade rage heads last year. I used the practice head along side my field points and had great results. When hunting season neared I screwed on the heads I would be hunting with to give em a trial run before heading out. 2 out of 3 opened on flight the first round. I inspected carefully then gave em another round with the same results. I couldn't trust em after that and will not use them hunting. I can't speak for others results, but after trying them I wouldn't recommend anyone waste money on these heads.