Mark,
Aside from long range waterfowl or turkey hunting, certain games, e.g., trap [DTL], bunker, helice or flyers, the best possible patterns are very desireable, so tight constrictions & high pattern percentages are the norm. Today's def of 'tight' is a bit less than yesterday's, where constriction is concerned, but remains the same for patterns.
The combination of an open pattern & a tight one in a two triggered double gun is like having the best of both worlds and they are instantly selectable. Selective single triggers are a bit less versatile, but effective for some applications.
There is a tendency to interchange choke designations with pattern percentages and view it as being absolute when they are often not.
There are all kinds of arguments that can be made for this choke or that one or for screw-in chokes or dial-a-chokes or no choke. That is what they had way back when .. none, unless it was unintentional. Cylinder bored guns with good quality ammuntion regularly retain some center density when patterned, at least that has been my observation.
I would say it depends on what you wish to do, what size shot is being used, the distances being shot, the intended target type [food or competition] and whether or not it may be taken cleanly with the combination of the aforementioned items factored in. If it results in needing a 'full' choke to get the job done effectively then there is your answer.
For best confidence when the gun is going to be used and not collected it should be to your liking. If you are missing close in birds for the bag because of the pattern being too small in dia. or ruining them because of the number of pellet strikes, a more open pattern is likely quite desirable. You can often accomplish that with different loads, but will not know until the gun is patterned. It is a mistake to think that opening the choke's constriction is ALWAYS going to result in more open patterns. Just my thots, perhaps something of use.
Kind regards.
