I just became a member & for what it's worth--I'm a 357 sig fan. I have a Glock 23 with 9mm, 40, & 357sig barrels. I have shot my Son's 357sig M&P & have a new one coming for myself.
Reloading the 357sig is no problem for me, but I do take special precaution with the headspace. Instead of grinding the sizing die, I ground a few thousandths off the shell holder! Works great.