“In a standard bullet, a solid lead core wrapped in a copper jacket sits atop a stack of gunpowder and lead primer. When the gun fires, the primer ignites, the gunpowder lights, and some of the lead on the bullet boils. When the casing snaps out of the ejection port, lead particles trail behind it. As the bullet hurtles down the barrel of the gun, a shower of lead particles follows.”
“If a gun range isn’t ventilated well, lead dust collects on shooters’ clothing and hands and lingers in the air, where it can be inhaled. The more people shoot, the greater the risk of being exposed to dangerous amounts of lead. It becomes an occupational hazard for weapons instructors, police and defense personnel.”
You can read the NPR report written by Angus Chen HERE.