I forgot to mention for the powder through expander type dies, I use with a Lee pro disk.
I've pushed the angle back on one to create a step but it breaks thru the case hardening, still works though.
And the die body needs to be re-set deeper when doing that.
Thought about putting a bushing on top of the expander instead of lowering the die, but haven't tried that (yet).
I suppose I could make a stepped expander with the proper lengths but I'd rather buy one as my lathe is a cheap piece of crap.
I've seen after market expanders (powder funnels) sold for Dillon dies that are bronze or some such alloy rather than steel, so I guess CRS would work without case hardening.
Anyone with a cnc lathe could knock them out of CRS quickly/cheaply for the common calibers, but with a complete Lee die selling for less than $12, I don't see any money to be made.
Sorry for typing/day dreaming all that,