A lot depends on how early (close) you shoot at the target, and your skill in centering the target. A very good, fast shooter will see very little difference in scores at 16 yards when changing from full chokes down to a "good modified"; that is down to around .022" constriction.
Any more open and average score will suffer, as well as wins.
Full chokes work well also, something close to .030" is very good, though it's certainly fine to use the tightest standard chokes, up to .040, especially for long handicap.
Short answer is the choke selection must be optimized for target distance - not where you stand but when the target is shot. GAP
I have been experimenting with the best 16 yd. choke constriction during this past year having tried .020, .025, .030, and .035 chokes. I shoot the target fairly fast but would say it is less than 35 yards during most 16 yd shots. My better and almost identical scores have been achieved while using .025 and .030 from the 16 yard line. I like the feedback from the breaks I obtain from the .030 choke best. I shoot .035 for handicap (24 yds). Ralph
I have a Carlson's IM that patterns a very good hot-core at 35 yards. At 45 yards it has spread throughout the 30" circle so I use it at the 27 too. For games longer then that, I use a full or extra full.