Why bother with the sign if your shooting enough!
Who has that much ammo to spend? Dont worry, when I win the lotto this week and get my 100 acres I will be hosting a 6 month long NES shoot at my new private range with a tractor trailer load of ammo... until then im lucky to get 100 rounds through the handgun and some rifle/shotgun time before I start seeing dollar signs on the targets...