...I had only the single die set and the idea of changing all my adjustments that were set up perfectly for terrific .38 Special loads just to make .357 Magnum seemed foolish...
Your die set didnt come with a spacer ring? Mine did, I use it for 38/357 and 44 spl/mag. The spacer isn't perfect, but works well enough. I rarely mess with the adjustments when switching between the different lengths, just use the spacer ring.
The 32 auto in the 1903 Colts is a fun round. If I could afford a clean 1903 and ammo or components, I'd shoot that gun and cartridge quite a bit. I regret selling the ones I had in the past