I just picked up a Western Cartridge Co. booklet from 1935. Makes me woder why our .410-bore and 28-gauge skeet loads are so damn expensive these days. In 1935 the list price for Xpert skeet loads in 12-, 16-, and 20-gauge was $32 per thousand. The 28-gauge 5/8 ounce loads were $34/M and the 3/4 ounce loads were $36/M. .410-bore skeet loads were $30/M.
The coolest shell I find listed in this booklet is the Super-X Pigeon Load -- PP26L -- 1 1/4 ounces of Lubaloy #7 or #7 1/2 shot in a 3-inch case for $72 per thousand.