Rifled Slug and Gun Part??

[mbcuce]

Had a couple of finds recently that I am not sure about. The first appears to be a rifled slug. Its lead and is 15 mm wide and 13 mm high. I was at a site with all pre-1800's artifacts. Any ideas about age are appreciated.


Found this item and would have just stored it away as unknown but its identical to another I found at a different site so now I need to figure out what it is.

 

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[ticndig]

yes the top is a shotgun slug . I'm not sure about the other part but it has the general shape of a trigger guard .