For years I was told to use an open choke with buckshot, that a tighter restriction would deform pellets and cause flyers ect.
Now I see all this stuff about Tight chokes and buckshot being better for longer ranges, I have never used a shot gun for anything mush over fifty to seventy yards myself so I have to do some patterning with my guns now as well.
My usual yote , bobcat, fox night gun is a old stoger sxs with IC and MC fixed chokes. I shoots real good with buck infact that is about all I shoot in it, I toof it dove and quail shooting one year and was not impressed.