It is assumed the “Remington Steel” used on the K Grade (Model 1900) Hammerless and (1894) Hammerless Grade “F.E.” Trap Gun (introduced in 1906) is similar to Marlin “Special Rolled Steel” and Winchester “(Cold) Rolled (Bessemer) Steel” with a tensile strength of about 66,000 psi..
Remington introduced Ordnance Steel for the (Model 1894) Hammerless Double in 1897. The 1902 catalog stated the Remington Ordnance Steel tensile strength was 110,000 lbs per sq. inch with an elastic limit of 60,000 psi
The 1889 with Decarbonized Steel was offered until 1908.
Interestingly, Crescent "Armory Steel" (and likely also Aubrey/Meriden doubles) was Decarbonized. This ad from
1926 still lists Decarbonized Steel barrels
Due to the wonders of the internet
we don't have to guess about turn-of-the-century Bulk and Dense Smokeless powder pressures. PLEASE NOTE that modern piezoelectric transducer measurements would be about 10% higher
“1895 Smokeless Powders For Shotguns”
http://books.google.com/books?id=Wv0...J&pg=PA446&lpg
3 1/4 Dram/40 grains DuPont Bulk Smokeless 1 1/8 oz. = 7440 psi
3 1/4 Dram/44 grains “E.C.” Bulk Smokeless 1 1/8 oz. = 7584 psi
The 1933 edition of ”Smokeless Shotgun Powders” by Wallace Coxe and E.I. du Pont de Nemours & Co. reported the pressure for 3 Dram Eq. with 1 1/4 oz. of DuPont bulk smokeless at 9,600 psi.
The 1963 George Herter “Reloaders Handbook” lists 23 grains (3 1/4 Dr. Eq.) of “Infallible” Dense Smokeless, now Unique, with 1 1/8 oz. shot in a paper case with paper wads (card & fiber) at 8,725 psi. (Courtesy of Mark Ouellette)
Of course, only you can determine the pressures that should be used in YOUR Decarbonized Steel barrels.