A couple observations from the photo. I had to use Windows pic viewer to magnify it so the quality wasn't great.

First, the case on the left looks like it was a pretty hot load. Primer is flattened and cratered. Just sayin....

I can't tell if it's the pic or what, but the primer on the right doesn't look seated correctly. Or maybe it's too deep? It almost looks like it's sitting in the primer pocket tilted to one side.

I'd definitely check the primer pocket on that case.