Nominal velocity for the nominal 158 gr bullet is about 1250 fps. All the makers are right there in their common offerings for .357 magnum. Lighter bullets will be faster. Heavier bullets will be slower. All are supersonic (boom) until you get to the "short barrel" or practice ammo at under 1150 or so and some under 1000.
I think you will be happier with heavier bullets, but if you practice with store bought ammo, these Fiocchis should be fine. That screaming velocity helps mostly with bullet expansion or maintaining POA on longer range shots.