I am trying not to derail any more than I have, I was an indoor shooter for typically half or a little more of my shooting. I don't like to shoot indoors if I can shoot outside but pistols/ARs etc. have rules and it's much nicer to not worry about the weather. System was supposedly topoftheline and likely is. I would blame myself one way or another for it despite being what I would consider diligent with washing hands and trying to avoid it wherever I thought I could. I can't say I put a lot of worry around it. Calcium intake and other stuff can affect absorption I believe.