Years ago, I reloaded 357 SIG using a combination of a single stage to FL resize and deprime then a Dillon SDB to prime, charge and seat the bullet then crimped using the single stage. As I recall, the main issue with reloading 357 SIG is getting the seating and crimp right due to the short case neck and avoiding bullet set back. One of the techniques for dealing with set back is to pick a powder and charge such that it fills the case. One nice thing about single stage loading is that you can check the charge by looking down the case necks in the loading tray prior to seating.