I went back to the site today and found this carbine bullet.
It's a .52 calibre Josyln Carbine bullet - unfired.
Several of these types have been found in the Shiloh area from what I've been told.
This one was found in the Vicksburg campaign area of west central Mississippi.
I don't know much about this type of carbine, but I'm about to research it!
If anyone has any info they can pass along it would be appreciated.
Thanks for looking.