I have a Lee single stage, Anniversary edition, I like the breech lock capibility for things like switching from 357 to 38 special, I just get extra set of dies. The Hand Press is pretty awesome, too, if you travel or something like that.

I'd suggest buying 2 sets of dies, one for 357 and one for 38 special, same dies, they'll just be set to different OAL, etc. and save you the hassle of always re adjusting them for each cartridge.

I'm not sure on the 38 SW, but whas the advantage of going this caliber? I can load 38 special to what seems to be almost 22lr kick and thump for smaller game, and 357 up to pretty potent rounds. Why mess with an oddball third? Just asking, maybe you have a specific revolver or something?