Dunno a Rice 32 from Rice Crispies. But I shoot a lot of 32 cal, as well as 30 cal and 36 cal. In all of them I am getting startling accuracy and great performance on game by working my loads DOWN the scale.
Even at 22LR velocities, those little balls raise cob with eating meat, as though you hit them with a 22 hollow point, but worse. I'm finding 15 grains of 3f too much on game for my tastes in 32 cal, and range tests say I'll be using 10 grains in it this fall. Still plenty flat shooting to 35 yards (far as I've shot it) and accurate as a snake bite.
I'd probably start yours at 20 grains of 3f, but try 15 grains as well as 25 grains just to see what's up. Dunno about ball/patch diameter, but tighter will be better for limiting fouling build-up. Most guys who complain about excess fouling in small calibers are either using too loose a combo or the wrong lube. Speaking of lubes, grease lubes keep fouling softer and limit swabbing better than liquids like spit, at least when you're field shooting with long waits between shots, rather than range shooting.