I am not sure what you are asking for? SAAMI max pressure for 38-55 is 30,000 CUP (page 21 in attached PDF or 33 using the PDF software numbers).
https://saami.org/wp-content/uploads...sting-Copy.pdf
All the loads listed on Hogdgon's website are 28,200 CUP or below. 30,000 CUP isn't "Ruger only loads", they are standard pressure loads. I ass-u-me that any other published loads would be below the 30,000 CUP level unless designated otherwise.
That said Buffalo Bore's ammo seems to be loaded to 38,000 CUP because "30-30 is loaded to 38,500 CUP".( 38,000 cup according to the attached PDF, 32 special as well, pages 29 and 31 in PDF) I guess since the 30-30 is a necked down 38-55 and chambered in the same rifles one could follow that logic, if they wanted to take that risk.
https://www.buffalobore.com/index.ph...t_detail&p=159
Quote from Buffalo Bore:
"Our 38-55 ammo is designed to work in all 38-55 chambered firearms made with modern metallurgy for smokeless powder. It operates at 38,000 CUP—the 30-30 Winchester operates at an average max. pressure of 38,500 CUP. For those who are not aware, the 30-30 case is simply a necked down 38-55 casing."