I'd be a little put out if that happened to me too. I use the outdoor range also, and while most of their efforts to keep the projectiles and noise inside the grounds, there's still the problem of ricochet. Without overhead barriers of some sort, I don't see how this can be stopped though. Our biggest problem lies in population expansion, and with that our right to practice traditions such as this are surely doomed in the long term. As far as progress is concerned what isn't planned for development, is planned for refuge or buffer. Our future is being marketed as we speak.
That said, have any of you ever walked close to a driving range or golf course. I can find a hundred balls within injurious distance and far off their property in just 20 to thirty minutes in some spots. No outcry.
The lead thing....I don't know. Lead is pretty toxic, but I don't know about its' leaching properties. If it does leach, it could be a problem. But I'd guess if that were the case, the feds would be using that against just about every single outdoor range that's been in existence for decades or so...with the exception of their own of course