Got out to do some woods detecting.
The lead bullet was inside the wood and I broke it apart.
The other lead bullet has a iron nail in it.
And the dog tag Rocky with 2 phone numbers.
Your slug with a nail in it is actually a screw....it was used to hold a fiber wad on the back to help stabilize the slug in flight....i used these when i use to deer hunt in Ohio....Brenneke was the brand