The "lead ban" in SD isn't quite as widespread as some who haven't hunted there might be led to believe. For example, on "walk-in areas" (private land on which the state essentially leases hunting rights, totalling hundreds of thousands of acres), lead is OK. Likewise OK on the National Grasslands. So even if you're hunting land open to everyone in SD, you may be able to get by with lead shot--for the time being at least.