Don't over-think the bore diameter. A soft lead bullet that fits case and barrel well enough ought to be fine - let BP kick it in the backside to bump up. Regulation is where the headache is likely to be.

The stars stamped on the breech are an interesting thing: I've seen them before on ex-military weapons; applied in service to denote some level of corrosion in the barrel - if on the breech, corrosion in the chamber; if ahead of the breech, in the barrel. Whether they have that application in this case I have no idea.

Last edited by cadet; 10/17/18 07:14 PM.