I suppose their ammo is limited to standard pressure 158 grain lead round nose (widowmaker).Back in the mid to late 1990s, British officers who responded to emergency 999 calls won a huge victory.... The right to decide for themselves if they could return fire in order to prevent their own deaths.
Before the victory, all guns (including issued S&W model 10 revolvers) were stowed in the back of the patrol cars in different electronically controlled lock-boxes. Arriving on scene, if fired upon, the officers first had to radio a supervisor to get permission in order to access even the box that held their sidearms. If approved, an electronic signal was sent that caused the box to open. Yes, they had to get permission to defend their own lives! Apparently their union had enough of that nonsense. Sued, and won the right to carry their model 10s. But the rest of the weapons remained in the lock-boxes, still requiring permission to access.