JDG, the bulk of airborne lead is NOT from the bullet impacting the backstop. The bulk of airborne lead comes from 1) the primer compound and 2) the base of the bullet being exposed to the combustion of the powder, which vaporizes a small amount of lead.
Furthermore, there is always unburnt powder residue expelled from the gun during firing. Go to any range, sweep up a bit of the floor, take it outside in a metal dust pan. Carefully drop a match into the dust pan -- whoosh! You'll get a big flame. Do you really want to spread highly flammable unburnt powder around your basement?
Regarding the health effects, when was the last time you had a blood lead level test? Your primary care doctor can do one for about $20.
Last edited by M1911; February 23, 2007 at 01:10 PM.