A similar study was done in the southwest several years ago for traces of lead from bullets and shot. My shooting range is in a small canyon where the walls are eighty odd feet high so the projectiles will be buried deep as the walls collapse. I still worry about it leaching into the water table however.
Correct me if I'm wrong, but isn't most lead from the case/powder, not the projectile?
I understand most bird shot is probably lead, and most .22lr is. However, most hunting rounds tend to have relatively small amounts of lead, and let's face it, most metals aren't prone to dissolving.
I did find this article in a fast google search, which suggests that lead poisoning in animals is from lead fragments in hunted animals, more than leached to the environment. Seems to reinforce the point of shooting only what you can kill confidently (FYI, not a hunter)
http://www.nps.gov/pinn/naturescience/leadinfo.htmPerhaps the NRA is seeking data to refute the perception that shooting causes higher environmental lead levels?