It's not the Lee RNFP, but I have a mold for a 125 grain SWC (Accurate 36-125K) and it does very well in my 4" S&W model 28, 4"Ruger Security Six, several different model 10s, and a 20" Rossi 92.
In .357 mag brass, I typically load 10 grains of Power Pistol, and in .38 brass I load 4.5 grains...