I only have a single turn-of-the-century 28g load pressure report
https://books.google.com/books?id=inQCAAAAYAAJ&pg=PA325 3/4 oz.
28 gr. Bulk Smokeless (2 Dram) = 8,322 psi
18 gr. Dense Smokeless = 8,994 psi
Until the 20s Crescent barrels were Decarbonized Steel.
I've test 2 specimens
c. 1900 Crescent “Wilson’s Welded Steel” = Non-standard Bessemer (high phosphorus) low alloy low carbon steel AISI 1017 with tensile strength 66,000 psi
c. 1910 Meriden Fire Arms “Armory Steel” = Non-standard Bessemer rephosphorized low alloy low carbon steel AISI 1211 with tensile strength 71,500 psi
That would be more than Damascus, similar to Winchester Standard Ordnance (cold rolled) Steel and a bit less than Siemens-Martin