I agree that if you are not 100% confident you shouldnt hunt, but there is a difference in confident in your set up to take a normal broadside or quartering shot. And confident in your set up to take any shot presented to you. Which is why I test (when i can afford to) on crazy shots, like a cow's sholder blade( most butcher shops will give them to you, but be prepared to replace broadheads and sometimes arrows after the shot).