Metallic lead is really quite safe. Lead _salts_ are what your body will readily absorb and cause you problems. Lead salts come from the lead styphnate in primers, old lead paint, and things like those, but lead salts don't particularly come from metallic lead.
I'd add any aerosol lead to the list like oxide dust and lead vapors from casting.
It's not about what lead you are exposed to but what lead your body absorbs.
Metallic lead is very deadly to birds because they have a totally different digestive system than humans do, and that's why lead is banned for waterfoul and game within the Condor range.
