I sized down 0.358in cast bullets with no issues. Actually made the sizing die myself on the lathe might have it laying around somewhere if you want it. It's just a bolt that's the same thread as reloading dies with a hole in it haha. Also for brass, 357 max with the rim cut a bit works once it's trimmed down, 360DW also works and was cheaper when I was buying brass. I also as an experiment cut down 38spl rims and used them. If you stuff the case with the correct power (I think I use 4227 but I'd have to check) it cycled well and no issues with feeding.