Larson, this is the one you were talking about on the phone? It does look like it could have been a foreshaft. The one tipping my son's atlatl looks identical, but made of bois d'arc.
that looks like one I found on the river down here years ago, they were socketed projectile bone points, mine "blew up" during preservation process. We find these in areas where they did alot of fish gigging. My dive buddy found inthe mud banks with his pin, 3 barbs that would have been attached to the point with pitch and sinew. THe foreshafts I have seen that made through all these years were alot thinner at the end. Yours wold have been socketed at the left side in your pic. Beautiful piece. No telling what it was used for