I just fired 14 rounds out of my 1950 Faz Mk2. 13 of them were fine. The 14th has a pierced primer. Tiny, tiny hole all the way through. Didn't sound different. Didn't feel different. Didn't shoot the bolt backward 'cross the room imbedding itself in a passing range master.

What should I worry about?
What should I look for to solve the 'problem'?

The ammo was factory fresh Sellier & Bellot. 150 grain soft points.

Thanks
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