I would NEVER use a dull broadhead on an animal. The main purpose of the head is to cut and create blood loss. Thats how an arrow kills. Using a dull head will not leave a clean wound channel. Your blood trails would be less. Penetration would be less. Sharp heads are not just for iffy shots. Come on. The animals deserve better than this. If you cant afford new broadheads then sharpen them, but don't just figure that these will do. I don't care if I am shooting a yearling whitetail or an 800 lb. bull elk. I always make sure that my broadheads are sharp. After all if it didn't matter then why do the manufacturers spend the extra money to put an edge on them. This is just plain fact. .