Was the thought that the gun would use ammunition with felt wads? I'm thinking felt wads would seal up a little better with that tight a bore.
I'm pretty sure plastic shot cups aren't the hot ticket with a gun so bored, just from studying the pattern boards with their use.
Anybody care to weigh in? Gun is a Spanish Uggy, nice enough old piece (1972) but, not old enough for the maker to discount the use of shot cup ammunition.

Thanks in advance,


Best,
Ted