I am by no means an authority on CW artillery. Yesterday my hunting buddy and I were hunting this hillside where we have found canister balls where the artillery was raking this hillside with steel shot. I found this iron piece yesterday and threw it in my finds pouch and brought it home. Upon just a quick cleaning I found this iron round piece to be perforated with holes. This piece is right at 2.5 inches in diameter and the center stem sticks up about a quarter inch from the centers piece and is hollow. This was found about 6 inches down. I was wondering if this could be some sort of piece from a canister shell. I looked in my CW Projectiles II book for reference but could not find a piece like this. Any help from someone more knowledgeable with CW artillery than by myself would be most welcome. Thanks for looking.