CW, I like the super full for the tight pattern. So far works pretty well, even though it likely wasn't designed for buckshot, but for turkeys and such, at least according to Mossberg and Sons.
I realize, but that's what I'm trying to say.. you WILL get a tight pattern from a more open choke as by not making your shot square!!
Think on this a moment... A shotgun choke was designed for small shot, like size 8-#2, roughly 10-15% the size of a 30+ caliber buckshot ball. Now take about 9-12 of these 30+ caliber soft lead balls and swag them thru that super-full choke. they went in round, what do you think they look like now? NOT pretty, NOT round and not very conducive to tite patterns.
Another point, every single so called Turkey load or long range load out has copper, Tin or at the very least hard antimony shot. A number of years ago waterfowl hunters had to switch to steel shot. they soon realized that the full chokes that where required with lead where near useless with steel. Why? Because the shot is harder and resists deforming, so it is able to fly true and keep tight patterns.
Dib you have a BB gun as a kid? Did you ever re-shoot found/shot BB's? Notice they never flew true... flat sides from hitting hard objects!! You need a sphere to fly true, BP hunters know this too, that's why you don't pound the ball down onto the powder, it distorts the ball, ruining accuracy.
just give it a try, I think you will be rewarded with, at the very least, more consistent if not all together patterns.
CW