Some moulds for these Lyman-Ideal bullets cast a but undersized for typical .32 revolvers, but if yours casts large, say .313 as-cast, it should work just fine. Some of the Ruger .32 Mags have tighter cylinder throats, and if you have one of these, sizing to .311-.312 is more in order.
I like the Saeco #322 120-gr. RNFP cast of wheelweights and tumbled in Lee Liquid Alox, loading them unsized, as-cast. I had Lee custom make me a .32 H&R Mag / .32 S&W Long factory crimp die with carbide profile sizer, which sizes the bullet by compression inside the loaded round during the crimping operation, so that you can bulk-lube bullets and forget the separate bullet sizing step which really speeds production. They get $30 to make one of these dies in calibers not ordinarily listed.
In .32 S&W Long cases I use either 2.0 grs. of Bullseye, 3.0 grs. of W-W231, or 6 grs. of #2400 in the Ruger Single Six and in my S&W Model 31. In .32 H&R Magnum cases for the Ruger only I use either 3.5 grs. of Bullseye, 4.0 grs. of W-W231, 7.5 grs. of #2400 or 9.0 grs. of H4227.
Some people load heavier than this in the Ruger, but I see the .32s as small game guns and if 850-1100 f.p.s. with a 120-gr. bullet won't do the job I get a bigger gun.
I also have a break-open single-shot small game rifle I had made in .32 S&W Long, converted from an old tiny .410 shotgun. In this the 120-gr. Saeco #322 loaded with 1.2 grs. of Bullseye is about 450 f.p.s., almost completely silent, and is both accurate and deadly on small game to 25 yards, making no more noise than an air rifle from its 26" barrel.