You’re biggest hurdle to increased pressure loads will probably be the large and most likely sloppy fitting firing pin. I bet the primers will flow or pierce well before you have to worry about the action strength.
What many folks are missing here are the 44 Winchester High Velocity loads manufactured from 1903 to 1938 and sold until at least 1942 and seen as late as 1945. That is nearly 42 years of service. These loads produced up to 22,000 cup chamber pressures while normal loads produced 13,000 cup.
You will far exceed revolver max loads before seeing any hint of high pressure signs on the primers.
