poor shooting is all i can say. If you read the package the rages come in you will see that it states that you need to change the O-rings that hold the blades or your heads will open in flight. It's all in where you hit them. You say it was a good shot? well do you have footage that can prove that or are you just insisting that you are that good of a shot that theres no way that you didnt make a clean hit? a guy I hunt with and myself both shoot rages. I know that we both shoot very well and neither of us have lost a deer due to using rage broadheads.