I'd encourage you to listen to the
first episode on my podcast, its all about hunters leading with non-lead ammunition.
I've hunted lead free for many years now. I've done the research on golden eagles and worked with others who have also conducted these studies and lead toxicity is a problem that is at least the western half of the NA continent wide. My call for hunters to switch to lead free is not about gun control at all, but rather a way to elevate your conservation ethic. For a minimal cost, you could have a significant impact. There are plenty of studies now on lead showing its impact if one wanted to read them. Citing them here to be dismissed out of hand isn't helpful to the cause. Yet the social capital to be gained by hunters by voluntarily switching would be a rare gain. We've seen recently what social cost there is for legal and regulated hunting of wolves north of YNP, and we have to ask if its worth to to hold on to something at all costs. Frankly, I see no win in holding out on using lead ammunition, but I do see the possibilities of increased hunter acceptance by the public when we make changes because its better for something other than the game we pursue.