In our recent ammo review, we found the Winchester Elite PDX1 Defender .357 Magnum 125 grain load to be supremely effective.
Velocity was quite respectable, even out of a short barrel snubnose revolver. We measured that at 1,214 feet per second on average, as measures by our Shooting Chrony Beta Master placed 15 feet downrange.
More importantly, expansion performance was impressive with some projectiles nearly doubling in diameter after passing through 4 layers of light canvas and into wetpack.