ed,
The local police force used to qualify at the same club where I shot on a center fire handgun target league. They have their own, private, outdoor range now, a good thing, as there are no limits on when they can use it.
It is also a good thing that it is private, as the public would be stunned to learn just how many of those on the force are really lousy shooters. Not all, but, a surprising number of the people in law enforcement consider the gun a nuisance they have to deal with, and clearly don't enjoy shooting and/or qualifying.
I expect the great majority of those full auto weapons in the hands of enforcement haven't even had a good cleaning in the last year, much less any serious use. They probably shouldn't have them, but, to keep an operator sharp with one takes time and money, both of which are in short supply in almost every police department in this country.

Best,
Ted