The rifle is proofed for the 14.6 gram(225.3 grain) lead bullet(Bl G). It was proofed in July 1924 ( 7.24) with ledger number 224( or is it 824 ?). This was well within the smokeless era, Raimey said he died in either 1937 or 38, I didn't see a retirement date. The left hand barrel is choked( constriction not shown), I couldn't see the markings on the right one.
Mike