Yes I use the parallelogram style patch.
.357 is pretty small, but I see people try .30 calibers so why not?
Hmm, I was kinda hoping to avoid getting a special mold.
Another thing that I'm going to look into: my sizing method. Since I'm loading for a tube-fed lever action, I'm using RNFP bullets. I just patch 'em, then set them on my Lee sizer nose down and run 'em through the die tail-first. Then I clip the tails.
I found that while trying this for some Truncated Cone bullets the nose deformed. The RNFPs have a much thicker ogive and any deformation is not nearly as noticeable as with the TCs. I'll have to examine the RNFPs for nose deformation and report back.
How do you size them after patching if you don't go nose first? I'd clip the tails of course but that still doesn't give me a real flat base to set on the press pedestal.