I would say if you have a large coral banded shrimp in a tank smaller than around 35 gallons, other shrimp would not be safe with it. I have a large one in a 46 gallon with TONS of other tiny shrimp and it has never harmed them or my fish, but it will chase after them if they cross over its territory. Thats why a 35 gallon or less tank would not be safe since its territory would take alot of space for others.
So it should be safe if your tank is bigger than 35 gallons. And you shouldn't worry about the fish or corals being harmed, its normally just shrimp and newly introduced fish that can be harmed by one.
I have never had a pistol shrimp, but I think they are pretty tough shrimp, I don't think a coral banded shrimp would attack it unless it was poorly acclimated and stressed.
What size tank do you have? Thats probably the biggest factor, second being how stressed your new inhabitants are and how vulnerable they will be to a large shrimp.
Keep us updated with how it goes and good luck