Now I'm confused again. The more I learn the less I know.
Up until recently I thaught the general opinion was that the advent of plastic shot cups revolutionized shot gun patterns. The standard chokes of M/F 75 years ago changed to I/M because of tighter patterns with plastic. Some gun writers tried to convince us that chokes in a shotguns aren't even necessary any more. Now I'm being told that at normal ranges it really doesn't make a difference.
Is there a simple explanation? I guess there usually isn't.