Above top is a shotgun that could be counted on to complete any shotgunning task. It is a Winchester Model 21 with two barrels. One is IC/M, the other M/F. All chambers are 2 3/4". Magnum 1 1/4 oz loads of 2 shot (previously lead but now Tungsten Matrix) works for all waterfowl within 40 yards. 3/4 oz loads for light game & clays, on up 7/8, 1, 1 1/8 oz for everything in between.
I added the Parker 0 frame just to show that there is room for a specialist upland gun.