you should have thought about the noise before you bought your house.
Don't close the range!! It's been there since the 60s, apparently that means it's been there longer than most of these houses...what kind of morons buy homes next to a shooting range and then complain about the noise? Duhhh...maybe you shouldn't have moved there then. Where are we supposed to enjoy our hobby? We can't shoot off guns in our backyards or in any random patch of woods. Leave us our shooting ranges, don't close it down and build more mini mansions...if that happens I swear I will puke.