I shoot a 115 gr RNFP cast from WW out of my 3 .327's. I load it with 3.7 gr Clays (Hodgdon's max)and a standard Small Pistol Primer. It runs an honest 1,000 fps out of my 5.5" BlackHawk, 950 or so from the GP100 and 875 or so from the SP101. No leading issues.
I shoot the same bullet in 32H&R with 4.0 gr Red Dot.
If you are looking at max velocity from the smallest powder charge, try Longshot. I have loaded a few of these with 100 gr XTP's but no lead bullets yet.
Reloading is really the only way to go with these .32's. I find it quite challenging trying new things but mainly stick with the cheap, cast loads for plinking.
Good luck,
32Magfan