Where did your friend find it??......It is possible that it could be a Civil War projectile, but it might be a modern day black powder projectile.....Looks like a buffalo bullet to me ...........The Civil War projectiles we found with a metal detector when I was a Teenager had a little bit more patina to them than the one in your pictures............Most of the Civil War era projectiles had a conical shaped head, and not flat
Yours could have been deformed on impact
The pictures just don't give me enough to go on
It is definitely a Black Powder/Muzzle Loader patchless Projectile from looking at the base.........That area expands on combustion to make contact with the rifling in the barrel
The projectiles we found when I was a kid had much more patina to them........Even after washing they were white
How deep in the ground??He found it using a metal detector in Danville. I guess that would be Twiggs County?
How deep in the ground??
I know where Danville is..........From my knowledge of Civil War History............I don't recall much activity in the Danville area, and just to be sure I Googled it, and did not find anything.
Shermans Troops went to the Northeast of Danville through Milledgeville, and Sandersville.
Closest he came was Griswoldville.
Like I said it does not look like anything we found on known areas of activity......The ones we found also had more grooves around the base...........Looks like what I have known from muzzleloading as what is called a buffalo bullet.
If he had found several in this location??
But this might have been a shot at a deer with a modern day muzzleloader.