I wouldn't say that. I'm seeing some "pour," however defined, on some of the other primers--which also depends on the "hardness" of the specific brand of primer.
But regardless of all that, the case splitting/blowing in that area is NOT typically a symptom of excessive pressure. Those usually occur around the primer--and there is no indication of that on any of the cases you show.
Which is why I believe it was faulty case.
