“re: Oil on primers makes them inert”.
Dear Doubting Thomas,
I seldom repeat what others of said, I do original research which is why I have over 200 articles in scientific journals.
But, if you need verification that oil applied directly to primers makes them inert, here is a web page with pictures. Please note I said primers and not bullets. Getting oil on bullets doesn’t seem to affect the primers because the working parts are now pressure fitted into a waterproof brass case..
http://www.theboxotruth.com/docs/bot39.htm