Hello. I have an artifact of some kind that was dredged up from the bottom of Vermillion Bay, Louisiana, and I'm wondering if it is a cannonball sabot?

Here are photos of it (note that it still contains some barnicle growth on it, or some kind of sea-life growth).

http://www.fotothing.com/skb8721/photo/202f71d7cc9fc5a0b9f6b64a2215609e/

http://www.fotothing.com/skb8721/photo/1ab7bed063a9231674c10993b97f7261/

http://www.fotothing.com/skb8721/photo/a202f083562c134f6e5e3ce06e9a450c/

http://www.fotothing.com/skb8721/photo/88fc7db54d6d839935c9bb37e4fac217/

It's made largely of wood, but it has traces of metal around it (badly corroded).

I look forward to hearing any suggestions as to what this item might be.

Sincerely,

Shane K. Bernard