Apparently necking down 357 brass is an issue but forming 358 wsm 1.8" isn't?
Sorry, but to broom's point, you'll be necking down or searching endlessly and paying $2-$3 a round.
Well taking a 325 wsm and creating a 358 is easy but taking a 357 mag in to a 256 is a little harder and very time consuming and seeing how I bought the rifle for a 100$ with original sling and scope I figure I can afford a box of ammo. Reeds has it from time to time but they have been out of it for a bit. And none on gun broker other than some for the single shot ruger hawkeye. So with that said I assume that you guys just want to make opinions and really have nothing to offer. Lol