If you can handle the recoil of any .357 Magnum round and get quickly back on target for follow-up shots, then I suggest looking into loads with the heaviest jacketed hollow-point (JHP) bullets you can find.
But powerful, short-barrelled pistols are very hard to control.
A better suggestion might be to stick with .38 Special loads with very heavy bullets, for instance 158-grain JHPs.
Fast, light-bullet, .357 Magnum rounds may not only be hard to control, but may also over-penetrate the, um, target. Heavy bullets travelling slowly are more likely to remain in the, um, subject and transfer all of their energy in a more useful manner.