BIG difference tween max cyclic rate for autoloader and full auto hand guns. Full auto does its thing at its own rate while you hold the trigger down. Autoloader does its thing each time you pull and release the trigger. Revolver goes bang as fast as you can cycle the trigger which is same speed as autoloader cept the autoloader has to also do its own thang tween trigger pulls.
Hence double action revolver faster than autoloader, cause less goin on.
.357sig.....full auto revolver should be doable, start with Webley-Fosbury, screw up sear, and hang on.
McGiveren's six shots in 3/5s second were all into a standard sized playing card, he did it more than once. That be tough with a full auto. He always stressed accuracy first, then speed comes naturally. Easy for him to say.
Sam...everything has to be somewhere, just not where I'm lookin.