I would just open the chokes up and be done with it. Make it as useful as you can and shoot it as much as you can. Then the next generation can carry on. 90% of these old doubles are choked too tight for most of our needs. Every one has their own favorite choke combo and I am no exception. Open it to something like .015 and .025 (mod & full) or .010 and .020 (skeet II and IM). I like the later combo for the 16 a lot and have used it in most of my 16's for the last ten years. It does what I need and works well for a wide range of game.
30 years ago I shot an entire hunting season with a gun that was I/C and killed everything from doves to quail to ducks and then geese. I just adjusted my shot and load to the game intended to be hunted and limited my range when needed. Most shots were inside 30 yards and everything was dead on arrival. 30 yards is a long shot for most hunting conditions on the East coast. And most will see 30 yards and think it is nearer 40 yards. In blinds I use to place distance markers at 25 yards as a guide. It became a known distance and shots with I/C worked well. SK II and I/M have become my go to combo for most situations these days. I am older and slower so a little more choke is OK as fast reflexes are a fond memory for the most part.
