Cam bearing issue

80fbody said
If the cam is tight in the bore, I’d say the shop didn’t size the bores after installing the new bearings. My shop makes me give them a cam so they can test fit it.

I wasn't aware cam bores needed sizing. is it common?

RustyRatRod said
Almost looks like a lack of oil issue.

wouldn't i find it present in other places too then? or not necessarily. because the main and rod bearings had no issue whatsoever