I found these on a river bank in Annapolis MD when I was a kid. Does anyone know what kind of rifle these came from and how old they are? The one on the right is a .45 ACP for size comparison. I didn't have a micrometer, but they are very close or slightly larger than .45.
https://www.milsurps.com/images/impo...fleslugs-1.jpg
thanks much
-Jeff L