I'm sure someone will recall--I can't--but seems I remember that the 3" 16 didn't last for long. Miller's Lefever would be pre-WWI. I was thinking the 3" 16 came along later, but I might have been recalling McIntosh's reference in his Fox book to the fact that they attempted to make a 16 gauge Super Fox. Didn't succeed. CPT Askins wrote that he was involved in the effort, but they were unable to produce those 80% average patterns. He does not refer specifically to a 3" gun, but he does talk about "chamber, bore, choke and cone changes."
