Ammo Shell Whistles

I thought it would be a neat idea to have a whistle made from spent ammo casings.  Did a little internet research and found several sites.  I wanted to keep the process simple, use common hand tools and easily available parts to make the whistle.  I ended up using different size rifle casings and wood as an insert for the venturi.  I created whistles from .223, 7.62x54, and .50 caliber casings.