If you load .357 mag in a short barreled revolver you will get all the thump without any of the benefit.
The loss of performance from the short barrel is such that the .357 loads end up with .38 +P values.
From the Speer GDHP Ballistics Table:
http://www.speer-ammo.com/ballistics/ammo.aspx.357 mag 135gr Short Barrel Load 990/294 2" bbl velocity/energy (at the muzzle)
.38 spl +P 135gr Short Barrel Load 880/222 2" bbl
.357 mag 125gr Std GDHP 1450/584 4" bbl
.38 spl +P 125gr Std GDHP 945/248 4" bbl
They go to a heavier bullet to increase performance because they have to tame the loads so much to be reasonable in a short barreled revolver.
Why pay, in many different ways, for .357 performance if you are not going to get it?
The Speer GDHP for SB Revolvers in 135gr and the Hornady Critical Defense load both work very well and post good numbers. Either way, I suggest you stay with the .38 +P loads. Even in your .357 mag gun.
I know, sacrilege!!! How dare I? and all that other stuff...So before anyone gets angry I am not disparaging the .357 magnum load, the weapons chambered for it or their owners. It is just my opinion based on having fired .357 mag, .38 spl +P and .38 spl loads through my Ruger SP101 and MY S&W M&P 340.
In those guns I found the .357 mag loads to be highly unpleasant to shoot, difficult to control and expensive when compared to similarly performing .38 spl +P loads.
Also, I'm pretty sure that Patrick Sweeney did a segment on this very topic on an episode of Handguns.
In the end, shot placement is much more important. I suggest that you take a self defense class as it relates to the firearm in CQB situations.
Stay safe,