Long ago, the rich had the peasants do whatever they wanted them to do. In the lore of hunting in the British Isles, even pictures on occasion, the rich man will have two or even three "bearers/loaders" for his 2 or 3 double shotguns. [Mel Brooks did a movie about France where the "nobles" were shooting "peasants..." Mighty trap to throw a person... Of course the peasant was honored to be chosen as a target...] The beaters drive the birds out of cover and they fly and the rick sob shoots two, hands the gun off, takes another gun and shoots two more and hands that one off, meanwhile the servant has reloaded... In this environment it was determined that a great lot of power was not needed for smaller birds and lighter guns with shorter shells were plenty... I could go on indeterminable but the bottom line is the rich sob's were showing off to each other by having 5 or 10 or 15 of everything. No doubt they had a 10 gauge if needed or could get one quick... Or summon a naval vessel with grape shot. ..money talks. I recall when the Browning "double automatic" came out in dark blue receiver/"navy" for the men AND in Kelly green --this was anodized aluminum; and in pink--for the "girlfriends". I was talking to a collector and "double automatics" came up and he said he had never seen "pink." That must be the ones that are, many years later, light brown.../ tan. And the world continues to turn. As suggested, if they feed reliably, 6 or 8 light loads in an indoor shotgun, much less likely to go next door and hurt the neighbors, but a real "grinder" on a local target... not a bad idea. Like the belled muzzles of the early shotguns. Happy trails.