And per usual with 9mm bullets pushed beyond their velocity limits, the penetration sucks.
Also, 501 ft/lbs doesn't come close to full power .357 Magnum loads. Shoot some 125gr Buffalo Bore .357 loads @ 1700 fps and tell me if these 115gr Underwood loads come close. I'll save you the time: they don't.
Sorry, this thread is a fail.