In the Miami shootout, most of the shooters were within 8 feet of each other, IIRC.
Evidently the feds were lousy shots.
What really caused the disaster in Miami was the bad guys kept fighting after they were basically dead. They were also using Ruger Mini-14s.
Autopsy later determined the 9mm bullets had performed as they should have. One I remember was tearing of one perp’s aorta off his heart. He kept fighting for nearly a minute.