The .30 Carbine is a self-loading rifle cartridge.
The .357 S&W Magnum is generally housed in a lever-fed,tubular magazine carbine. It is unlikely that the .357 S&W Magnum will ever be commercially found in a self-loading carbine.
86 years ago (1930) the police relied on lever-action rifles, but no longer. The .30-30 has since given way to the .30 US Army (the .30-06) and then the 7.62 x 51 self-loading rifles.
At 100 yards, the full-power 110 grain .30 Carbine Soft Point load is still traveling at 1602 fps, generating 627 foot-pounds of energy. This is usually more than most .357 S&W Magnum revolvers are generating at the muzzle of a four inch barreled service revolver! :move eek:
I'm sorry, but with this information, my bet will continue to rest on the .30 Carbine. :thup:
Thank you very much.