That sounds nice and easy, and maybe that's possible in New Mexico. Consider that a .22 has a range of a mile. How far will a .30-06 or a .243 WSSM carry if it goes over the berm? How high does the berm need to be to protect against idiots?sounds like poor range design. should have plenty of downrange space for flyers.
"Rapid fire", at the range I am a member of, is an insurance problem, and anything faster than a shot per second is considered rapid fire. But, they don't use timers so it is arbitrary and different between RO's.
Rapid fire at the local ranges that don't allow it is clearly defined as shots per second.
The ranges that do allow it, of course, have no opinion on the subject.
The very nice outdoor range I prefer has a 1 rd per sec rule.
To still get decent practice I use five small targets on a single backing at 25 yards, and rotate shots around them.
Since that takes about one sec per shot, it's not bad.
Fortunately, there's also two indoor ranges that don't care.
So I go there to practice rapid fire.
Life is good.