You have to load you shot gun on the clock in cowboy action. So a double can be just as fast as the 97. In Wildbunch you can have the shotgun preloaded. Back on topic the most of 16 guage 97 were prison shotguns during WW II since all the 12 guage ammo was going to the military.Most cowboy action shooting requires that the shotgun has an exposed hammer. Given that, the '97 holds more shells than every twin-blower (SxS) and allows for far fewer reloads. That's why folks use the '97 in CAS, not because there's no disconnect.
WOW. I'm drinking some Bud (leaded). It just occurred to me an average farmer/hunter assumed a 16 ready to digest 2 3/4 fodder. When these longer hulls were introduced into repeaters; the ejection frustration put a lot of these guns under the bed/in the closet. 2 3/4 repeaters are marked as such. (not Nickle Steel) and will feed... I don't believe it matters much with a break action. There is probably a niche here with current technology. We could have 20/16/12 fun but the next barrier is steel. I have a full box of Win 16ga bismuth: the hulls are blue. IDK.
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It also just dawned on me this was documented by Jim Carmichel when I was in Jr. High.