Re: Tyler, Texas
Mark Wilson, the citizen who engaged the armored shooter at the Tyler, TX Courthouse was using a Colt. .45. Mr. Wilson made several center of mass hits on the shooter and it didn't faze him at all. The gunman walked up on Mr. Wilson as he was reloading and shot him to death.
I seriously doubt that several non-penetrating hits on body armor, regardless of caliber will cause an assailant to stop his attack. It may scare him off, but the bullet impacts will not physically make him stop.