We have been shooting them out of the parker Enforcers and have had zero problems with them yet. Between myself, my son and my cousins wife we killed 6 deer with them,including a 100% gut hit and the furthest recovery was 100 yds. all but the gut shot were less then 50.
I have quite a few aquaintences shooting them out of their crossbows and have not had any complaints yet. One thing about them though is you have to pay attention that the blades are secure in the oring when you put them into the crossbow. If they are not I could see them not flying correctly.