Ok, so what can an over engineered 357 Blackhawk do?
It can actually shoot REAL .357 Magnum ammo. Stuff loaded to the original 1935 load levels, not the reduced loads sold today.
I concur with .44AMP. A Ruger Blackhawk enables the reloader to get "true" 1935-style ballistics out of a pistol, using loads that would shake apart a K-frame in short order.
Trying to turn the .357 Mag into a .357 Max or .35 Remington is tempting fate in a big way.