I haven't shot any of my Tobins enough to note any issues. Those old 3 1/2 drams of bulk smokeless powder or 28-grains of Infallible or Ballisite dense smokeless powder pushing 1 1/4 ounce of shot 12-gauge loads available when the Tobins were being built were plenty hot!!

G.B. Crandall offered 12-gauge 3-inch guns on the Tobin action in the twenties and thirties.