Thanks to the generosity of several here, I'll be making another run to METL for composition analysis of frames and analysis and tensile testing of barrel segments.
I've got these frames:
1890 Early Hunter Arms Fulton Transition L.C. Smith Hammerless
1892 New Ithaca (Hammer) Gun
1900 Remington Hammerless Model of 1900
1909 L.C. Smith 00
c. 1927 Crescent Empire No. 60
And barrel segments for composition and tensile testing
Pieper fluid steel (it has been reported that Pieper used Cockerill steel)
"Cast Steel" (likely Decarbonized)
If you have something to contribute, please send an email to drewhausemd@yahoo.com and we'll see if it is something not already tested.
Thanks and the results should be interesting. Several sources suggest turn-of-the century frames were AISI 1020.
Summary of the previous barrel studies are here
https://docs.google.com/document/d/1cvqRzkg0wEjhAAcFWr8gFi7aPFRsSIJ_hahfDxmrNAU/edit 
