We got a 36" roll of paper and made a pattern board. We tested all our chokes at 20,30, and 40 yards.
The open chokes like cylinder bore, skeet, and improved cylinder did very well on 20 yards, further out they opened up too much and would have gaps to miss the smaller birds.
Light mod, and mod did better at 30 yards. Little tight at 20, and little open to much at 40.
Improved mod and full did better at 40 yds. closer they stayed together too much. at 20 it blew a hole in the paper and only a few flyers around it.
We used # 8 shot to test. Upon conclusion, the light mod did best all round on sporting clays. Cylinder, skeet, or improved cylinder did best at skeet. Trap did best on mod, or maybe light mod. Some sporting clays were at a distance and we changed chokes, some were very close, and we would use IC. 80% of shots the light mod was fine.
So, inside a house, the shortest legal barrel with the most open choke is best, no matter what you shoot. Outside at yard distance it still works ok, because at that point you are not hunting.