I had two of the fairly late model S&W .32s, probably from the '70s. I tried them with several cast bullets and found them to be reasonably accurate, but was less than impressed with the cartridge.

My favorite load was an 88 grain flatnose bullet (RCBS mould) cast from ww alloy and sized to .314", loaded with 2.5 grs. Bullseye, MV = 830 fps from 4" barrel.

I don't recall now whether I crimped bullets or not, but likely did. I tried several powders. Bullseye provided best accuracy followed by Titegroup. 231 and Universal didn't do well.