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Load Development- 28 nos/H1000

So I switched to Retumbo and 175gr bergers. Still using Peterson brass and WRLM primers.

I'm getting a little "click" at the top of the bolt lift even at the bottom end of the load range (77 to 78 grains). My velocity is right around 3000fps at 78 grains, so I feel like I shouldn't be over pressure. That click at the top of the bolt lift is getting in my head, though.

Question. What kind of over-pressure marks would you expect to see with a bolt face like this? It doesn't have the telltale round thing like a 700 bolt face.

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