I agree with most here that lead bullets are not much of a threat to your environment, (unless you at the wrong end of the barrel), but you should use good hygiene when using it(wash hands, ventilation in ranges ect).
But I can tell you first hand that the EPA can and will create and enforce laws on a whim to appease "environmentalist" .
My first hand experience with the EPA's BS laws, a while back I had a garage I used to occasionally paint cars(I had a regular job auto painting, and used the commercial zoned garage to do a few after work).
I had "homemade" a paint booth in the garage that mimicked a "real" commercial paint booth(clean filtered air intake on one end, and wet filter material on the exhaust end to catch any over spray from exiting building and getting on things outside).
Well a body shop a few doors down didn't like my painting(made theirs look bad) so they sicked the EPA on me for not having an "approved/commercial" paint booth like they had.
They (the EPA)showed up in their white suits and clipboards(yea, 3 of them) to shut me down.
They informed me right away that I would have to cease painting cars there because I was violating the law regarding capturing VOC's (Volatal Organic Compounds) because I didn't have an "approved" paint booth.
Well I'm not a scientist, but I immediately told them to go pound sand and to come back with someone higher up the EPA foodchain because "approved/commercial" paint booths do not capture any VOC's because VOC's are a GAS !
There might be a way to separate one gas("VOC's") from another gas ("the air"), but I know paint booths don't do it !
I expected them to return in force, and just strong arm me(without any rightful reason) into shutting me down, but behold, they never returned !!!
The moral of the story is that the EPA unfortunately, CAN and WILL pass laws without real scientific evidence and attempt to enforce them on behalf of left wing tree huggers with an agenda.
Rant over.
Chris