Consider a Lyman Cast Bullet book #4 and Ken Waters' PET LOADS. Your exact bullet may not be listed, but data is close enough to be usable with minor charge adjustments. I used to have a couple of S&W .32 Long revolvers. I was less than impressed with the cartridge, but had good accuracy results with an 88 grain roundnose bullet cast from an RCBS mould, sized to .314" and loaded with Bullseye powder.

In addition to data, PET LOADS provides a lot of very useful information on the cartridge for the owners of guns in this chambering.