I am a noob but I have cooked up one fairly successful batch of 357 Sigs for my G23 with a G32 barrel stuffed in it. I had a devil of a problem with set back. The way I discovered it was to make up 10 rounds with a consistent OAL, rack them rapidly through the gun by hand and then measuring them again. I did the FCD thing then found I didn't need it. I use the Lee four-die carbide set and do just fine. My trick is to size them with the decapper then put a slight flare with the Lee powder drop die. I have a Hornaday LnL. The seating die removes the flare and the crimping die puts another .001" crimp and gives a final sizing. I started with Montana Gold 125 gr JHP bullets but found them hard and slick. I switched to Precision Delta 124g 9mm JHP bullets and felt they stuck to the case better.
The REAL TRICK to solving my set back problem was to use a compressed load of 13.0 gr of AA #9. This powder is so slow, you are not in danger of loading a kaboom. The Lyman 49th velocity is 1400 fps however and is a pretty stout handful at the range. It's still a kick to shoot. No pun intended, lol.
Also, I use Hornaday One Shot lube. I like it a lot - No cleaning after loading. But, I don't want any in the case mouth. So, I spray the inside of a ZipLok with it, toss in a hand full of cases, seal it and massage the cases by hand. This works very well. I marked the ZipLok and reuse it each time I lube.