The bullet on the left is a .35 cal and the one on the right is a .45 cal. Anyone know how old these are? I did some research and found out this is a Prototype Coors can from 1975.
hard to say how old the bullets are. I've got a Remington Model 81 Woodsmaster rifle in .35 Remington that was made in 1941, and ammo is still available today.