Those are some pretty heavy 28-gauge loads for the turn-of-the-century!! Up until the 1931 introduction of the 3/4 ounce progressive burning powder, high velocity, 28-gauge loads, the factory 28-gauge loads offered were 1 3/4-drams of bulk smokeless powder (or 14-grains dense smokeless powder such as Infallible or Ballistite) pushing 5/8-ounce of shot from the 2 1/2-inch shell or 2-drams of bulk smokeless powder (or 16-grains dense smokeless powder such as Infallible or Ballistite) pushing 5/8-ounce of shot from the 2 7/8-inch shell

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

RST offers a great little 2 1/2-inch, 5/8-ounce 28-gauge shell.