>100 y/o barrels that clean certainly suggest previous honing. What was Mr. Merrington's opinon regarding the bore and wall thickness?
Unfortunately the resolution of the larger pit is inadequate to provide any opinion. $38 units are reliably reassuring if the bores are
clean or only with tiny pits; less so if a larger pit is found, esp. 6" from the breech
This inexpensive tool provides excellent definition out to about 10"
https://4570products.info/Clearview-Brass-Bore-Scope-16.htm Of course the depth of the pit is in the eye of the examiner, and Kirk Merrington would be an expert examiner.
