Has anyone besides me noticed that when most writers extol the virtues of a Cylinder bore gun the comparison is virtually always made to a gun having Full choke. True in most upland situations a Cylinder gun is more useful than a full choked one.
In My opinion though a 1/4 choked one is much more useful & versatile than either. A 1/4 choke in a 12ga will run to about .010" constriction which is what many of the old US makers stamped as Imp Cylinder. A true IC is just what it says & only goes to about .005/.006".

Miller/TN
I Didn't Say Everything I Said, Yogi Berra