Hi, this is my first post. I've been reloading for rifle and also pistol, but I'd certainly not say that I'm a pro at it, by any means. I bought some Frontier CMJ .357" 125 grain bullets that I was going to load into my 357 magnum, but they look so close to the factory 357 Sig bullets, that I thought about loading them for this, even though they are .002" thicker. I wondered if the CMJ would make a difference. These also have a cannelure. Any recommendations for powder? I might just buy the jhp bullets that are made for the 357 sig.