My stepfather found this digging a hole for a fence post this was 3 feet deep there was a couple of civil war forts here in western wa and there was a few territory wars in the mid 1800s
Looks to be to me too. I do see where Bartek is coming from, doesn't seem to have allot of pitting,but maybe came up nice and was polished like Scrappy mentioned. Send the "TheCannonBallGuy" a PM , he is the master on Artillery.