OK.. sorry about the delay in better pics. Life got in the way. Anyway, not a fishing sinker, split or bismuth shot... I wired brushed and steel wooled (not a real word) the crud off of one. It's not lead and isn't magnetic. I don't think it's pewter but what do I know. The tail is hollow, but I can't see any type of threads.
I can't help but think its some type of civil war period piece of military minutia as I've found several in more than a few places that I've been. The kicker was Sunday finding 20 between 2 people. Someone else has had to find one of these.... other items I found that day: harmonica reed, broken spur, flat buttons, round balls, minie balls and a few modern head stamps.
Anyway, thanks for looking and hopefully I can figure this thing out.