pablo: Always shoot your combat load, even on the range. A common mistake that inexperienced shooters make is to fire a “target” load on the range and then load the weapon with a hotter load for protection. Big no-no.
Many .357 shooters use .38 Special on the range and then load .357 Mag loads for protection. In a combat situation they are then unused to the recoil and muzzle flash of the heavier Magnum load and therefore are ineffective at the most crucial time.
Definitely don’t ask at the range, unless your rangemaster is an experienced combat trained shooter.
Federal makes an excellent load for the .357, the 158gr Hydra-Shok. Takes a little getting used to, especially with the recoil and muzzle flash, but a real stopper, especially coming out of a 6″ tube like your K frame Smith.