In the words of Gunblast writer Jeff Quinn Quote: " The 357 Magnum out of a carbine barrel is a whole different animal than the same cartridge fired from a four or six inch revolver. The combination of a sealed breech and long barrel really brings the efficient little cartridge to life, and it can safely be loaded up to 30-30 power levels, and with a fatter bullet."
I say horse puckey. You can't make a 357 on par with a 30-30 when shot from rifle barrels. No way, no how!