In the September 1933 issue of
The American Rifleman, there was a good article on the 32-gauge by James Vance, M.D., F.A.C.S. He had gotten a 32-gauge Lancaster with straight grip and 30-inch barrels. At that time the load offered by Winchester and Remington in their 2 1/2 inch 32-gauge shells was 1/2 ounce of shot --



At that time the loads offered in the .410-bore were 3/10 ounce of shot in the 2-inch shell and 3/8 ounce of shot in the 2 1/2 inch shell.
However, three months earlier, an article by F.C. Ness in
The American Rifleman introduced the new Winchester Model 42 and the 3-inch .410-bore shell with a 3/4 ounce load. A year or so later the load in the 2 1/2 inch .410-bore shell was upped to the 1/2 ounce we've known all my life.
All this making the good Dr. Vance's 32-gauge arguments rather pointless.