Originally Posted By: Hal M Hare
Gun is Belgian and barrel markings indicate post 1930 manufacture. Same source indicated that the 28 gauge guns were
proofed for 21.25 gram loads--which appear to be 3/4 ounce.


21.25 grams of shot with 3.6 grams of powder was the service load in 1906. The proof load was heavier. The proof law changed in 1924, but I do not know how it impacted the 28ga loads.

Pete