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I beg your pardon, sir?

Ok . Stiff bolt lift is another sign of a hot round, now that I think about it.

Did you have any trouble lifting the bolt to extract the cases once you fired them?

Not so's I can see.

Pressure tends to flatten and /or crater the primers.
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There are other signs but those are the 2 I know to look for, besides the holes in your norma cases.

Hard to know unless you can inspect it visually.

I've had it happen with one of my Howa's and seen the same thing. It carried on ticking away just fine.

As mentioned above, it looks like it's...

What he said. Take the hornady ones as well, to show it isn't the firing pin that's the problem