Someone has been winding you up.
Nope. & I’ll tell you how I know.
Some years ago (90’s) I had a petrol station about 5 miles outside of Durham City & next to it was a disused quarry. At the time & maybe still, Durham police firearms officers were travelling down to the ranges at Catterick to do their training. Someone looked into the idea of using somewhere closer & looked at using the quarry (It’s called Running Waters FYI) There were only a handful of people who’d be affected by any noise, me, being closest, my mate who owned the pub 300 yards down the road, & the people of Shadforth village, about a mile away.
Me, my mate & some dopey councillor were invited to Catterick ranges with the police to see what the crack was (pardon the pun) & were shown what weapons Durham were using at the time. These included H & K semi auto 7.62mm rifles, H & K 9mm pistols, an Accuracy International .243 sniper rifle & the .50 ‘elephant gun’ as they called it. Can’t remember what make it was though.
During the course of the morning we were shown each weapon & even got to give each one a shot or two. Apart from the .50 which was demonstrated by an officer.
So stick that in your pipe & smoke it.
Edit, they never got to use the quarry as some specialist from the army came & had a look & mentioned an effect called ‘pop over’ which means that occasionally a round may go into the backstop but ricochet out of the top, so it was deemed unsafe.