Air Shotgun – Projectiles?

Got some small punchouts from work. We perforate metal for aeration flooring for grain drying. Size is .05″ diameter X .036″ metal thickness. I wonder if it could be used as a projectile as we have thousands of pounds of it every few days.

Anyone have some thoughts or have an air shotgun that can shed light on using this small metal punchouts as ammo?

Here is a picture with a .177 pellet for size.

I think I mentioned in a previous post that I was thinking of making an air shotgun. Again, if anyone has an air shotgun please send me some more information.

Thanks,

Pedro