A 1900 Parker hang tag states that 12g 2 5/8” chambered guns were patterned at 40 yds. in a 30” circle using 2 3/4” shells with 1 1/8 oz. No. 7 chilled shot and 40 grains (3 1/4 Dram) of DuPont Bulk smokeless powder. 1920s tags still listed Bulk smokeless.
Scroll down just past 1/2 way here for other maker's hang tags:
https://docs.google.com/a/damascuskn...UOZEFU/preview