Back in the early 1970's I remember reading an article in Sports Afield that stated the average hunter owned a 12 gauge pump shotgun, a bolt action 30-06, and a 22 semi-auto rifle. I looked at our gun rack and saw none of these. That's when I realized that my family had ignored years of mass marketing and persuasation-oriented articles.
16 gauge is a great upland gauge. I can think of no better for pheasants. Unfortunately there are many parts of USA where ammo is very hard to find. Yet in other areas, ammo selection is abundant. So it goes. Mail order is the way to go for many hunters who cherish this forgotten gauge.
Jack