The Winchester 73' is/was not as weak as most somehow believe. When Winchester first offered Smokeless powder back in 1895 for the 44-40, the box specifically shows for use in the Winchester 73' with the Winchester 92' only being shown on the side label along with NOT FOR PISTOLS. Red label boxes indicated smokeless powder while green label boxes indicated black powder. Certainly no chance of confusion there. Obviously indicating the pistols were the "weak link" and not the 73'. Here is an excellent read http://www.cascity.com/forumhall/index.php/topic,57837.msg735243.html#msg735243
Remington Hi Speed ammunition shouldn't be confused with Winchester's High Velocity ammunition. During the early 1900's Winchester's High Velocity ammunition was packaged in Lavender boxes with ".44-40 Winchester Model 92' Special" on the box but also added "LOW PRESSURE" while the 1910 era to 1938 High Velocity boxes had Yellow labels and produced 22,000cup, once again NOT FOR PISTOLS and NOT FOR THE 73'. Remington's High Velocity boxes indicated "safe for all firearms".
Modern 73's are chambered for the 357's 35,000psi pressures and the 44 magnum's 40,000cup pressures so I feel confident 22,000cup would be fine although I have no desire to shoot such loads in my 73'. That's what my Marlin 1894CB is for as well as my 20" MGM strain gauge fitted test barrel.
Winchester's colorful ammo boxes https://www.44winchestercenterfirecartridges.com/single-post/2018/12/01/Winchesters-Colorful-Cartridge-Boxes
Edited: High Velocity load box side labels specifically say NOT for Winchester 73's. Gotta watch that copy and paste option!