"Try this as your "baseline"
UNDERWOOD performance357 Magnum 158 Grain Bonded Jacketed Hollow Point
Caliber: 357 Magnum
Bullet Weight: 158 Grains
Muzzle Velocity: 1500 fps
Muzzle Energy: 789 ft. lbs
Then you'll know where the "magnum" is.
It's not hard at all to load the .357 Magnum to maximum
peformance." [Quote] Actually it's not hard at all to list unrealistic specs
for the ammo you load. If you actually believe that this ammo will
chrono at 1500 fps out of a common 6" revolver just because the mfg.
lists that as the velocity ....well ... buy a box, test it and report back
please.