I use those heads and always replace the blades before hunting with them.

You could have damaged the ferrul. I wouldn't hunt with that one, practise head if it will still fly. One thing that could happen is the blade-s wont stay tight. It's also a problem if you practise with them too much. Crap builds up in the groove and they wontseat right.

Got lucky a few years ago, bought close to 50 along with packs of replacemnet blades for a buck a peice.Shoot'm all the time. Never found a bad one.[8D]