Well it wasn't because he absorbed the lead through his skin! Metallic lead is normally not absorbed through the skin. An environmental toxicologist put a post on a lead poisoning thread here about a year ago. He stated that .06 of ONE PERCENT of lead exposed to skin was absorbed by the body! 6 tenths of ONE percent! He may have had a high lead blood level, but it wasn't because he was touching lead. Besides, lead poisoning is a slow insidious process, it never makes you immediately sick.
Alliant 10-X and other powders have nitroglycerin in them. Some people are real sensitive to it. If you actually touch the powder, you can get a pretty bad headache from it. Ask any heart patient who relies on nitro pills to help with angina!