Yeah, that gun is built on the same frame as the SuperBlackHawk. It's a "44Magnum class" gun but can take even more power than that. There's various 45LC+P loads out there that meet or slightly exceed 44Mag bullet energy and those are completely safe in your gun.
One thing though: when you hit big recoil levels with a Ruger SA, you may experience "base pin jump". The "base pin" is the "axle" the cylinder spins on, that comes out from the front. There's a spring-loaded cross-latch that holds the pin in. If it were my gun, I'd do one of two things:
1) Get a "spring kit" for it (about $20), which generally includes a stronger base pin cross-latch spring to fight pin jump. This is what I did.
2) Get a Belt Mountain replacement base pin (about $25 - $35 depending on style) that has a hex set-screw to nail it down tight. Belt Mountain pins are made tighter and tighten the action. Usually this is a good thing. Once in a while we find a Ruger that was unusually sloppy to begin with, and once you tighten it up with a better base pin it's "tighter", but also tightly OUT of proper alignment. Always do "the revolver checkout" (see stickied thread) after putting a Belt Mountain pin in to make sure you're not in this boat. Very rare though, m'kay?
Putting a stronger cross-pin spring in NEVER hurts anything. A Belt Mountain pin usually improves the gun (in addition to flat halting base pin jump) but once in a while hurts it.
If you're going to shoot mega-loads, I personally would run one of these two mods. I explore the very hottest possible 357s in my New Vaquero and did the spring kit right away - made the trigger/hammer feel nicer too.
