I do not Feel it's what gun they were shot it, that sometimes displays like a foundation bulge soon after sizing. I would probably evaluate you sizing die and powder funnel. Whether or not the chamber is oversized the act of sizing will lower the surface diameter back to spec. https://9mmdirtyoncefiredbrass87520.pages10.com/how-9mm-reloading-brass-can-save-you-time-stress-and-money-72937140