I need to know the exact kind of ball used in the canister rounds that would have been supplied to the 12-pounder Napoleons at the Battle of Gettysburg. Books I've looked in give specs for the 12-pdr. field howitzer round and some others but not for the 12-pdr. M1857 Napoleon, unless they are referring to that weapon by some other name.
Diameter of balls? Material cast from? Number of balls to one canister round? Exterior dimensions of canister round? What reference to cite for that info?
Thanks
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