Hmmmmmm??
Strange to say the least.
More questions ---> cannelure, so they were undoubtedly crimped into the groove. NOT magnetic would be my guess.
'06 huh ? I know that before the bigger and better chamberings came about there were some '06 loads that used heavy bullets. I remember a 200gr but not 220. Could have been though,I guess.
Were the primers gold or silver ?? Gold would be my guess. Did they appear to have any case mouth or primer sealant ??
Let us know when you find ....."the rest of the story". -----pruhdlr