Many of Edwin Hedderly's articles are digitized
Forest Stream, Nov. 13, 1909, “Small-bore Guns”
https://books.google.com/books?id=l0kcAQAAMAAJ&pg=PA790&lpg Arms & The Man 1915, “Loading Small-Bores”
https://books.google.com/books?id=BX07AQAAMAAJ&pg=PA158&lpgRecreation 1917, “Handloading for Small-Bore Guns”
https://books.google.com/books?id=4uVQAAAAYAAJ&pg=PA97&lpgOutdoor Recreation 1919, “Loading Small-Bores”
https://books.google.com/books?id=BX07AQAAMAAJ&pg=PA158&lpgField & Stream, Nov. 1921, “Sixteen” – Or “Twenty” Which
https://books.google.com/books?id=UPtAAQAAMAAJ&pg=PA704&lpgOn introduction in 1923, Hunter Arms referred to their gun as the "Long Range Wild Fowl", but shortly thereafter the gun was advertised and cataloged only as the "Long Range". Hunter Arms records show that one was made in 1921 and an Eagle Grade Long Range in 1922. Only 14 were made in 1923. Total production of Long Range shotguns (1921-41) was 2,606. The "Wild Fowl" name was used 1940-1942 and 98 were made.
Additional information may be found in the Spring 2013
Double Gun Journal Volume 24, Issue 1, p. 137.
Not all LRWF had 3" chambers and if so, had the football "CHAMBERS 3 INCHES" mark on the barrel flats. The top gun has the "reinforcing wedge"