I was rereading an old book on upland bird shooting today ("Hitting Vs Missing With a Shotgun" Hammond 1898) when I found reference to the loads the author used.
I have posted about this subject before a couple of years ago.
...The charges that I have used for many years in a 12-gauge seven pound cylinder bored gun, with entirely satisfactory results are, for the right barrel-which I nearly always use first, three-drams of good black powder with five-eighths of an ounce of No. 10 shot, and for the left barrel the same amount of powder with seven-eighths of an ounce of No. 8 shot. These charges give good penetration and pattern, while the recoil is scarcely noticeable.
I mention this because of the talk on this board of the heavy charges used today in a twenty eight gauge.
When I posted this a few years ago the general opinion was that the author was probably a market hunter who shot only sitting birds.
But when reading the book you would find that the author was an enthusiastic sportsman, and shot only flying birds.
Pete