Generally speaking for a 200 pellet load.
Cyl to 25yd
IC to 30yd
LM to 35
Mod to 40
IM to 45
Full to 50
Now these numbers are just guidelines to start at the patterning board. Always pattern your gun- you owe it to the bird and your wallet.
Theres other things that influence the necessary choke, such as pellet size. If you are shooting 6s or 7.5s you can use a more open choke because the increased pellet count will fill in the pattern more than 5s or 4s. The same goes for shot weight, 1 1/4 field load is going to have more pellets than a 1oz target load obviously. 1 1/8 5s and 4s is not a lot of pellets, 190 and 150. You need roughly 100 pellets in a 30" circle to make consistent kills in the air from my experience.
In comparison:
A guy shooting a 12ga 1 1/4 #6 has 280 pellets to work with, so an IC pattern that lets say puts 70% on target at 30 yards is equal to you shooting 1 1/8 5s in a turkey choke putting all 190 pellets in that 30" circle. Thats why you cant just go by what choke people say they use without asking specific questions.