Well I can tell you that it is not impossible for the blades not to open, but it is a once and a million shot. I placed a shot on a spring gobbler and it was a bad one. It went through both eyes. Dropped it where is stood but the blades did not open. Now that is a rare case and I have pics of it. Do I believe that you can hit a deer in the vitals and it did not open, well lets just say that I would have to see the pics. I think that we can agree on 1 thing, there are a ton of blades out there for all of us to give a try and find the ones that we like. I'll stick with the rage until I am disappointed. 3 years and going. I just wish that I came out with this design because I'd be havin a whole lot of fun...