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Primers inconsistency

Fred B.

Gold $$ Contributor
in all the years of shooting, I have checked and re-checked brass, powder and bullets over and over.
Never crossed my mind to check every primer before using, aside from weighing them.
I picked up a primer to use and it didn’y Feel right, so I got my super glasses on and found this (wonder how I have used without knowing):

1B8ECEBF-FDAE-4F54-ABC3-84722569CC93.jpeg
 
Not good it will definitely have some sort of an affect on the round I’ve never noticed any of that ever but I have never really looked
 
It's my understanding that the paper, or foil as it's also called, is a manufacturing convenience and has nothing to do with performance or shelf life of the primer.

Yes, that's my understanding of the foil as well. And I might add that the foil has such a low flash point that it doesn't really interfere with the ignition regardless of its position.

However, in looking at this one, the foil being offset like that may have compromised it's purpose, which is to help manufacturing equipment distribute the ignition compound evenly at the bottom of the primer cup without some of it sticking to the pin that presses it down flat into the cup. It's consistency during manufacturing is kind of a sticky paste. So, in this case, some of compound may have stuck to the pin that presses it down since the foil was out of place, which if so would compromise the ignition.
 
Last edited:
From the looks of the photo, it appears that foil/compound slipped over in the process of setting the anvil over it.
More than likely would still fire and very little, if any, notice would be seen in the fired round.
 

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