Likewise. I'd take it to .015 and use the thing.
Obviously, you want to hire a good guy.
.015 is a 35 yard gun with modern ammo using hard shot and a shotcup. Plated and buffered high density low velocity handloads can even stretch this out if desired.
There are different grades of spreaders you can load too.
1. Hard shot, remove the shotcup.
2. Chilled shot, remove the shotcup.
3. Hard shot, use an X wad.
4. Chilled shot, remove the shotcup, use an X wad.
That way, .015 is almost like having screw chokes and all you need to do is fish in a different pocket for shells.
I color code things with STS green and gold, gun clubs and black beauties. Same hulls, different loads.
Yes, it's a lot of fiddling but this is a hobby and if the load changes don't actually do much you can at least delude yourself. Confidence is half of shooting!
