civil war medical tool?

[maxxkatt]

This was found in a site of a proven Union field medical area. it came out of the ground totally rounded and encrusted as seen in first picture. Part of the encrusted end popped off in handling before I use electrolysis on it.

I am not sure at all what it is. It is ferrous and is attracted to a magnet, and it is heavy almost like lead, but not quite.

From the location and the amount of encrusting (rust) I don't think it is anywhere near modern, eg post 1900. If not metal, maybe a gun part?

Help if you have any ideas.

 

[EmuDetector]

has the shape almost like the bottom end of the bayonet. My dad had a full Union surgical kit and I can't remember anything this large/heavy in it. that doesn't rule out medical though..