What would be the problems in building a shooting range underground? I think the main problem would be the actual construction, and here's what I have at the moment for what is necessary. - Soundproofing around the range, to prevent noise pollution - Well ventilated to prevent lead buildup (someone advise on this please?) - Filters in ventilation to prevent spreading lead to the outside area - Cooling throughout the range - Bullet catcher at the and of the range (again, advice?) I'd like to point out this is only a hypothetical, as I don't really have the ability to create such a thing (not to mention the "publicity" form anti groups, lol). However, I do believe that this would be a good idea (at least until it's shot down, so to speak).