Capt'n Jack
Do you still have pdf's available for ammo boxes, both the 7 round and 42 round boxes.
I have several loose rounds of .56-50 rimfire ammunition, all manufactured by Sage Ammunition Works. (29 live rounds, and 6 pieces of empty copper) If it is brass, and not copper, then it sure looks like copper to me.
Since you have the experience and material, I would be interested in purchase or trade of 2 large boxes and 7 small boxes with Sage Ammunition Works labels.
Either way, I appreciate your offer, if it is still available.
Was your Grandfather the famous sniper that lived in Tennessee? Captain Jack Hinson, he owned a plantation near Dover, Tn, and has a book written about him.