DevLcL=you're a candy a** wimp
--a 12 bore from such a he man like yourself, why not a 10 bore or better still an 8 bore or even a 4 bore and in your 1800's design stock, with lots of drop of heel, crescent butt stock and steel butt plate, oh and in a light weight version so you can carry it easier when going to investigate that bump in the night...by the way, do you go deer hunting with a .700 NE?
OH, they probably did take a 20G but as a .62 cal trade gun/musket.
You match the gun and caliber to the game and conditions...I know lots of people who only own one shotgun (usually a 12G) and use it for everything, (just changing the powder loads and/or shot size to match the game), whether from economics or preference doesn't matter...others I know have guns, some even multiple guns, in every or just about every modern gauge available--kinda hard to shoot multi gauge skeet with only a 12G--unless you have barrel inserts.
Why? Is it because of the challenge of less shot? Reduced recoil? Less carry weight? Size appropiate to person's frame, gender or age? Yes to all of the above!