My test just over a year ago was near toxic levels. I switched to lead free pistol primers and don't shoot indoors. I gave away all my large primer .45 Auto cases and bought small primer cases, because I couldn't get large lead free primers. This past September, my lead had dropped to half of what it was. In the spring and summer, I had cast about six thousand bullets, in a garage near the open door, so casting wasn't the big problem. The lead styphnate in the primers is the real baddie.
A club members who is a professor at the local medical faculty did a lot of digging into the lead issue and confirms this.