Need info on "Hydro-Forming"

[Jaybird62]

I'm working case forming for a .358 wildcat based upon 7.62x39. I need to push the shoulder, slight though it is, out a bit. I need some help on the step-by-step process of "hydro-forming."

Thanks,
Jay

[GRUMPA]

Like this?

http://castboolits.gunloads.com/showthread.php?292645-Hydroforming-the-25Rem