What is it?

Unfinished Musket shot?

I found arrowheads, and cannonballs on my parents place in Oregon as a child. Still have one of the cannonballs.

Could it be a shifter ball?

Bead Curtain? (probably not)

Ball Mill artifact is decent guess... Maybe one that was never put into production?

Meh...

Looks like a ball used in a Ball Mill, used for crushing coal. Are there any coal mines or power station in your area?

Regards JD.

OOps just read the other post

measure the diameter "caliber?" i think it's a musket ball too. the where used up until the civil war.

i appears that the ball was forged around a rod or wire. it looks like grape shot "i think i'm repeating someone" that may have been used in a cannon. was this area used as a battle field at one time?

Any old forts near you could be grape shot from old cannon they were iron.