BobK said:
Randy, the thread is "Steel Shot Scientific Research". Quit adding "other topics" into the mix - it only causes more confusion.
You really have to. Already cited, there has been extremely substantial research:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6675766/ .
There are 128 cited sources alone in the above. That is more than enough to satisfy anyone looking for research.
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If someone wanted to get belatedly cranked up on lead, there are plenty of sources to read. Looking singularly at lead shot is misleading. If the idea is healthy game and wildlife populations, you have to consider unowned cats, windmills, disease, and habitat loss. It isn't a simplistic as steel good, lead bad, not remotely close.
Often, the very stuff steel shot is coated with to prevent rusting (zinc, cadmium, etc.) is also toxic to birds: "Heavy Metal Toxicosis."
https://www.mspca.org/angell_services/m ... -in-birds/ .