The resident gunsmith, Willie Boitnott, during the NMLRA National Matches during the '80s at friendship, IN, used tiny round mirrors, which were highly polished pieces of polished steel, as I recall. He would drop one the right size down the bore until it rested on the breech, then shine a light down the bore and view it. I got him to check the bores on a 16 bore Powell for me, in about 1985, before buying it.
SRH
I was at Friendship just last month. Still have a fair turnout there these days. But it rained both weekends and that hurt the marginal visitors. But you could buy whatever you wanted or needed with no crowds. I had the nipples replaced on my 20 bore double. Gun checked out amazingly well. Kept the ones which came with it but Im sure they are not original 180 years tends to see a lot of parts replaced. Friendship is about an hour from me and is always worth a visit each year.
