Brian Pearce's Redhawk only loads that approach 50,000psi, begin a half grain over Hodgdon's "Ruger only" data. Starting with 24.0gr under the 335gr CPBC, he gets 1366fps out of a 7½" Redhawk.

That's a half grain over max with a revolver three inches longer than my Bisley Vaquero.

335 Cast Performance WLN-GC Hodgdon H-110 24.0 1366

335 Cast Performance WLN-GC Hodgdon H-110 25.0 1424

335 Cast Performance WLN-GC Hodgdon H-110 26.0 1485

335 Cast Performance WLN-GC Hodgdon H-110 26.5 1511