This
158gr ammo from DoubleTap will deliver 687.5 ft/lbs at the barrel from a 4" barrel.
This Hard Cast
180gr ammo will deliver 557 ft/lbs @50 yards from a 4" barrel.
Grizzly Cartridges makes some very good
.357 Magnum Hunting Ammo that is probably the best available. (and prices so)
There are others out there that are also good but the ones above I've used and can verify they are good ammo.