Thread: magnum primer v large rifle primer

Originally Posted by Toby

I noticed on the Federal bullets they have blue stuff on the bottom, whats it from? and whys it there?

It seals around the primer to help stop moisture getting in. I've stolen some nail polish from the mrs to do the same job, just wipe it off the top of the primer so it only seals the edges. Also different colour polish can indicate the number of firings the brass has had