I was reading another post of a member wanting to set up his own range and his need for a bullet trap to prevent contamination of his land. First off I am no way against this in any way nor do i condem anyone else for this type of concern. My question is how much/many rounds in a given area over a given time to actually cause concern to wildlife and waterfowl? My current rifle range at home is 312yds and a large hill is my backstop. I recover alot of bullets easily after firing to measure weight retention and or to later be melted for cast bullets. After a good rain more tend to wash out. Right wrong or other, the local conservation clubs use a hill side or a man made berm. Even while i was enlisted there didnt seem to be any concern for the lead getting shot down range. On these larger scale ranges there may be more of a concern but is there really that much of one for a home range that sees 400-600 rounds per year? There are a lot of variables like drainage, total area etc. that would surely make a differance too. Just looking for other thoughts and opinions.