Did 19th century percussion caps pose a health risk?

Feb 2018
107
Various places
To the best of my knowledge mercury fulminate was a principal ingredient in 19th century percussion caps for small arms. I'm no chemist, but isn't that a fairly toxic substance if ingested/absorbed into the body? Is there any evidence that some users of percussion small arms back in the day encountered health problems due to things like inhaling mercury fumes from the exploding caps? I'm not expecting them to have known all the health risks of mercury at the time, but given what we know now I was just curious if there have been any studies linking incidents of mercury poisoning to percussion cap use back in the day?
 
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Nemowork

Ad Honorem
Jan 2011
8,483
South of the barcodes
The lead isnt exactly harmless...and im talking about ingested not injected at velocity.
 
Feb 2018
107
Various places
The lead isnt exactly harmless...and im talking about ingested not injected at velocity.
True enough, that's why I only shoot outdoors. I don't like taking chances on an indoor range having poor ventilation...