I've also got the Elastic Limit / 2% Yield data, but here are some historical comparisons
Winchester Nickel Steel, introduced for the 1894 rifle about 1896, and which was sourced from Bethlehem Steel Co. in 1900
http://books.google.com/books?id=YzhUAAAAIAAJ&pg=PA181&lpg Tensile strength – 106,900 psi, Elastic limit – 81,000, Elongation – 16%
Winchester Proof Steel, developed for the Model 21 and introduced in 1931, 115,000-120,000 psi with an elastic limit of 105,000 psi
http://books.google.com/books?id=9SvbdIv4OKYC&pg=PA57&lpg 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
Marlin “Special Smokeless Steel” introduced for the Model 1893 rifle in 1897 and Model 21 Grade C Pump in 1907: 100,000 psi with a “very high elastic limit”.
