The cross-over point between a blooming full choke and a withering cylinder choke is around 25 yards. If you shoot birds beyond 25 yards, you will benefit from some choke. A thirty five yard full choke pattern will, for practical purposes, be identical in size and shot distribution to a twenty yard cylinder pattern. So, you can have a larger effective diameter by choosing open choke, or the same pattern at longer range by choosing tighter choke. A open choke will retain an ever decreasing effective diameter to long yardages, so you would need to be "rifle" shot to use it. Tight choke will require the same fine marksmanship at short range, but is likely to be destructive of meat. You will have to decide on the trade-offs depending on your target and your range.
