Thanks for the info guys. I’ve not seen green in the grooves yet but lanolin sounds like a reasonable suspect. I was seeing oxidized lead surface on bullets, quite a bit actually. Pulled some a month or so back that had been loaded for about 6 months. Inside the cases and grooves was normal looking but that lead forward of the case was terrible.
Took a couple of bullets today, lubed one with SPG and the other with NASA then tucked them out of the way. Going to “lube” a couple of cases and do the same. Will let you know what develops.
