Jim, if it wouldn't be too much trouble, please precisely measure the 4-pdr, 6-pdr, and 12-pdr. balls' diameter and exact weight. In past checking, I've found that some RevWar cannonballs are a bit smaller in diameter than Civil War era ones. So, I'm curious to know the precise measurements of yours, because coming from you, their 1779 provenance is rock-solid.
Regards,
Pete