They should have the Concrete pipe go all the way to the target (Covered with at least 4 feet of sand) so no projectiles could possibly escape the range.<G>. Sounds like the Insurance Co. is running the range.
We have a condo community being built next to our range and in order to get financing they had to bring the noise level of our range down to a certain level.
They offered to spend close to a million to build new outdoor ranges. Our board of Dir. jumped at the money so we'll see what kind of design they come up with.