IIRC the SS was the basis for some pretty popular wildcats in .22 cal, which all died a horrible death, at least until some makers picked up the .25SS again. Donaldson Wasp, maybe?
I recall reading about a fella that went through a couple seasons of competitive target shooting, on 3 or so 25-25 cases. He was throwing charges on the line and breech seating his bullets, priming and depriming was the major wear on the cases (which were pretty much unobtainium too).
Cheers
Trev