Hi, i just bought Alliant 2400 to load for 125 gr XTP .357 mag. My gun is a SW 686 in 4 inch barrel. I dont reload but my friend does. He has the dies etc. I am interested to load half to 3/4 powder loads of this recipe. What are the velocities im looking at? I testing this load for fun at the range and if it shoots tight with my gun, i can load more for home defense. Thanks for any info and tips.