That is a good old reliable shotgun. My grandpa used a Winchester M37 Steelbuilt .12 gauge. Grandpa always bought a 30" full choke and sawed off 2" of barrel. He would finish off the cut and remount his bead. Gramps claimed that was the perfect amount of choke for a rabbit, quail and squirrel gun. My guess is that ended up as a light modified constriction. For rabbit and quail that's about right, mite open for a general purpose squirrel gun I think.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.