If your blades have been in a target they are dull...
I' m just going to mention this just in case someone else is doing this...
This guy asked me to help him get his broadheads shooting good, I spent a couple of hours helping him and we got his broadhead hitting good and shooting good groups. He had four broadheads he was shooting so when we got finished I told him to get his other blades and we would change them for hunting and then spin them to make sure they were true.
He then told me that he always hunts with the blades he shoots that way he knows they are flying right. We were shooting a 3-d target and We must have shot 40-50 shots that evening. If anyone thinks this will not dull your broadheads please believe me when I say hunt only with NEW blades, we owe it to the game we hunt.
Considering the amout of money we spend on bow hunting, the cost of replacement blades is very very small.
I just wanted to pass this on in hopes of maybe helping anyone that is new to bow hunting.