First off, I do not mean to denigrate any comment made of the hazards of casting lead bullets, or breathing fumes from melted lead, or anything else in that realm. I am only posting my experiences with bullet casting over a period of 46 years, with only a 4 year hiatus while in the military.
I started casting at age 16 in an unventilated garage. Did so for years. During that period, I worked for an outfit casting bullets on a commercial basis. There were no bullet casting machines back then, and I used a battery of four 4 cavity molds, one after the other as fast as I could. The area where we worked was very small and unventilated. There were usually five of us working and we each had three pots going. one ready to cast, one in the process of melting lead and the third just starting out with a new load of lead. I did that for about four years when I entered military service. When I got out, I resumed casting, and have done so until now. Although my present shop is well ventilated, I'm a slow (?) learner, I have only been using it the last 20 years.
The point of all this is, when I had my last physical, I asked the doctor to unclude a test for possible lead poisoning. I figured that with all my earlier practices, there surely must be some. I was surprised to fine out that there was no measurable trace of lead in my system.
As all my shooting has been done outdoors, I was not too worried about lead from primers.
Seeing that I literally broke all the rules for a long period of time, I'm either very lucky, or the hazards are overly exagerated (sp). Me? I'll follow the rules now, because now I know better. Back when I started, the issues of lead contamination were not given a lot of thought.
Just thought I'd pass this on. Go ahead and cast, or use lead bullets and take the appropriate precautions and you should have no problems.
Paul B.