Pending case head separation is evident by a bright ring around the case head, at the point where it will separate, as shown in the photos above. Watch for that, not bulging. Winchester cases and Remington, are just fine. Buy a broken case extractor, and keep it in your gear. You may get a complete separation some time and need to remove the portion in the chamber. No need to spend the extra money on Lapua or Norma. They're good; maybe they're better, but not that much better.