Well I met up with Pete and learned a ton today in the short time I was with him. It is a Union 12 Lb Case shot (shell or ball, which is the correct term?) and it is going to be the centerpiece of my tiny collection. To think that Monday I found my first civil war items ( 2 .69 cal round balls,2 buckshot, and a a fired minnie as well as an Iron Case shot ball and a piece of a shell) and less than a week later I find a intact 12 Lb'er.
This is what it looks like now. Going to use electrolysis to clean it up, got a lot of good info on how I should do this from Pete as well. One question I do have, is should I plug the hole from the inerting process, to keep the resin/lead balls from being affected? maybe a cork or rubber stopper? What say you all?