Stimpylu32 is absolutely correct with regards to SAAMI specs.
I would use the heavy & high pressure (approx 32,000) reloads in an
SB2 framed Handi. Those are listed in many reloading manuals as RUGER, etc. ONLY loads. When working up these loads, start low (consult the manual=not TOO LOW) and look for excessive pressure signs while working up, i.e. flattened primers and cases "sticking" in the chamber (difficult to extract).
WARNINGS: I would NEVER try such loads in an SB1, and I would NEVER exceed "RUGER etc. ONLY" max loads in any published loading manual [[but that's just me]].