I will make this short and sweet.
According to Redding their universal decapper doesn't have replaceable pins but all of their rifle dies have the small pin.
So I have a Redding Reloading Type S Full Length Sizing Die in 308 Winchester, #77155; and after looking at it I confirmed the following:
- the body will not touch a 357 Sig
- the pin is replaceable
- the pin will fit in the small flash hole
So you can use most large rifle caliber Redding dies as a universal decapper on 357 Sig cases and it will even work on the Speer small flash hole cases.
David.