Yeah sorry I posted off the search function and didn't see this thread categorized under "reloading" and was the 'freshest' on the topic.
To answer your question mac1911, the company I work for requires quarterly blood lead testing as part of our insurance package. Some of our staff spends a significant amount of time doing construction administration in abatement sites. For whatever reason the policy includes testing all of the staff instead of just those specific people. In the past 7 years my B.L.L. has been a steady <3. My living environment hasn't changed and I'm on a medically restricted diet (it sucks) with no major variations. The only new vector has been shooting indoors, so that is the definite source for increased B.L.L.
My post was to quantify with evidence that for some unfortunate people like me, even small exposure is enough to noticeably increase blood lead levels, and for people to be very cautious (use gloves/respirator the later which I wasn't wearing) doing anything shooting related indoors until they know their tolerance for absorption. I suppose the only way to know a personal tolerance for exposure is to be tested regularly for a few years while keeping a regular shooting/reloading schedule in the same environment.
Edit:
I will follow up here in a few months with my levels after switching to outdoor only.