My go to Gambels quail gun: 20 ga LC Ideal, 30" ejector gun, choked full and full.
My go to Mearns quail gun: 1902 Parker VH 28 gauge, 24" barrels, choked IC and full.
My go to Guinea fowl, pheasant, and everything else outside of AZ: Fox A grade 12 gauge with 26" barrels choked IC/Mod.