Please excuse our ignorance and interruption. I hope the below pictures might help John, or if not him, at least help us identify what we have. Maybe it's relevant to John's query, but I'm not sure. Anyway, here they are.
These sleeves of lead were found by Forum member Ripcon, and were dug near Union artillery positions, in between Union guns and the enemy position. I was with him when he found them. We have never really known what they were for sure -- Civil War, modern, etc. Reading this very informative thread, I can't help but post them in hopes that it has SOMETHING to do with the James shell as there were James Type I guns near the location of recovery.