335 cast with 22.5 grains H110 will get you 1,226fps and pretty good accuracy. 22 grains of IMR-4227 will get you 1,110fps with good accuracy. Used WLP primers.
Best accuracy I've found with that bullet from my Redhawk was VV N110 - 18.0 grains of N110 got me 1,009fps and a tad under an inch at 25 yards rested for a 5-shot group, which was fairly repeatable from one range session to another.