Found this at low tide, along the Columbia River. Not sure if it is a bullet that was shot into the ground, or a carved nipple protector for a musket. Diameter of a penny. The top seems to be whittled, and the inner area appears to be hollow....
Nokta FoRs Gold, a Gold Cube, 2 Keene Sluices and Lord only knows how many pans....not to mention a load of other gear my wife still doesn't know about!
Dizz, thanks...ready to proclaim this one "solved". No rifling that I can find and the lead is consistent with molded bullets from the late 19th Century to early 20th. I sure learned a lot about "slugs" today!