Lead has a funny way of getting into the environment, and into your blood.
I did circuit board repairs for 5 years, basically soldering a minimum of 4 hours a day.
Add to that, I smoked a lot at the time.
Lead on hands, hands on cigarette, cigarette in mouth=lead in bloodstream.
Also, I shot a lot at the time, as well as reloaded.
You could see where I wouldn't want to increase my exposure by having lead in my drinking water, lead in my clothes, and lead on my tableware.
None of the techs that I worked next to seemed to think that lead was a laughing matter, either.
Handwashing seems to help a lot.
Lead takes a while to make it through barriers like skin, but it does eventually make it in.
Handwashing, esp before smoking, is highly recommended.
At least wear socks on your feet when reloading, and when you take a break or handle anything potentially containing hazardous materials, wash your hands, minimum.
Another thing to think about.
If you smoke, airborne particles (Like lead from running tumblers!) are attracted to the flame on the end of your cigarette.
A burning mass, even one that small, generates a static charge that attracts airborne particles to the end of the cigarette, right next to your face, and I wouldn't count on cigarette filters to minimize your risk.
Also, proven fact, that airborne particles can and will REMAIN airborne for 24 hours or more with NO air movement, and will definately collect on anything that generates static electricity, like your clothes, hair, socks, cigarettes, etc.