My whole reason for this is I have shot 2 deer with these heads no problem. But I have heard of problems. I have shot the 3 blades not the practice heads into many many targets with no issue of them not opening. I just want a honest opinion weather I change 2 the 2 blade or continue with the 3 blade model. Just I want a warm and fuzy before I start this deer season knowing that they will open every single time like they have so far.