It would not be remarkable to find a Civil War artillery shell in Nashville TN.
The Nashville Plow Works manufactured CSA artillery shells on the bank of the Cumberland River in downtown Nashville.
The shells used in this sculpture were discovered in a large cache that had been discarded in a pit. The shells were charged. Construction workers had tossed an unknown number of them into their pickups & trunks. Metro bomb squad disarmed any that were brought in, no questions asked.
During the excavation of my friend's dream home near Grannie White Pike, they protected a CSA artillery earthwork from the Battle of Nashville.
Historic preservation took a turn when the dozer scraped up 12 pound shells & case shot packed in buried ammunition boxes. When, by chance, my cousin answered the 911 call, boys were shrieking with laughter tossing & rolling them down the hill.
After seeing black stuff dribbling out of a shell, he made a hasty report. His portrayal of calling into his incredulous sergeant is very droll. "They are fully charged bombs the size of a cantaloupe…" "What?" " There must be a hundred of the darn things!" "….. say what????"
E.O.D. Soldiers from Fort Campbell detonated them in place.
No reason to dismiss your sphere… have you washed it out? If not, that would be a good idea.