I do wonder why the "all business" types don't simply have hammerless 1911s, instead of a commander hammer and a big ol' beavertail. A high-grip safety, sans beavertail, and a flush hammer would be lighter, anyways. Wouldn't look as nice, though.
Thats what I remember hearing.If I recall correctly it was a specific requirement of the US military during the final 1911 acceptance trials. The cavalry wanted the ability to thumb-cock the pistol if necessary while on horseback. Evidently the SAA manual of arms was still fresh in their minds at the time. Prior to that John Browning wasn't sure which way the military was going to go so he assembled his prototypes both with and without an exposed hammer spur.
and a spurless hammer prevents you from decocking the pistol.
Keep in mind that the original manual of arms for the 1911 was not cocked and locked. C&L is mostly a post-war invention IIRC.
I'd tend to think that the length of the spur would have more to do with the firing pin strike...
Runs the gun, because ( for instance on 1911 style 45ACP) springs can /might be 14#'ers , add all the timing, loads to meet PF ....blah blah...Cylinder & Slide makes an uber-light, skeletonized, spurless hammer for raceguns, BTW