I am far more interested in wall thickness and location of the thinnest areas, than bore diameter on most guns. If they are too thin I dont care if its because they have been reamed, honed or filed down to remove external pitting. So if there is a .004-.005 difference in bore diameter what does the wall thickness measure? Still .020 or .025.
Ithaca small bore and Lefever small bore guns were often struck thin from the factory. I had a DS which was untouched with .018 barrels and a Ithaca 20 which has .020 barrels. Highly doubt the Ithaca has ever been honed or refinished. In fact its so thin I wont refinish it. Best to leave as is.
