It won't look normal in the primer tray. That's the benefit of a flat primer tray like MEC uses vs. a tube. You are more likely to notice a primer without a seal and that in my experience always means no priming pellet.
I found several W209's like that back when they had their problems 15 years ago or so. That problem has been fixed.
I've found more than one pistol primer without an anvil also. I favor single stage reloading for metallics, and that's one of the reasons. The Lee Auto Prime has saved me from loading several duds.
Factory ammo is one of the better consumer products, but anyone can have a bad day.
