I have some 300 WSM brass that has been shot and reloaded 3 times or so. I have seen some signs of too much pressure (ejector marks on some case heads) and am loading down to fix that. My quesion is will overpressure loosen up the primer pocket? I had some loaded cases where the primer fell out and they are so loose, you can push the primer into the cases by hand after they are fired and resized.