We had them in the USAF as std. issue for flight line and missile security and for base defense, for those men assigned that task.
I was an Air Policeman but mostly assigned to law enforcement and interior building security, like at the Air Intelligence and Nuclear Weapons schools, so used them only during expanded security alerts and for annual qualification.
My normal weapons were a .38 revolver (occasionally a .45 auto) and a nightstick. We had 12 ga. pump shotguns when indicated.
I had first learned about them in HS ROTC and a pal had one that he tried to kill a burglar with. Found blood, but the target escaped.
I had read enough about their limited stopping power, at least with FMJ military ammo, that I had little confidence in them and they weren't very accurate, either.
I was very pleased when the AR-15 replaced them.