I always try to set up at 25-30 yds for as long as possible on the rifle side, but some ROs are real crybabies and expect you to zero in 3 shots.
This wasnt an issue at the far end of the range (black power benches), but they close this section off for some reason
It's ricochet issues. The bullets on a properly designed range should go straight into the back berm, not hit the ground before it. The closer the targets are the steeper the angle and greater chance of a ricochet. Less of a problem for 22lr and blackpowder, but the issue is still there. That's why the city laid sand on the ground to absorb the bullets, but that blew away and not replaced a long time ago.
Even the bays have their own problems due to poor design and lack of maintenance. The railroad track, no sand on the berm, not sure if the berm is mined for bullets or not, etc...
There are reasons for the rules at the range and bays that most people don't know about.