Having seen way too many empty hulls, the ones that are pierced the most are the cheap Winchester Universal shells. The firing pins tend to pierce sometimes, other times just become "embedded" in the primer and keep the gun from breaking open. I have used all sorts of primers in my reloading including Nobel, Fiocchi and Cheddites. Never had an issue of pierced primers with any of them. When I compete with the SxS guns, I use either Fiocchi or RST shells. Once again, never had an issue. I've even used (many, many times) domestic primers in Fiocchi or Cheddite hulls with no issue of primers backing out due to being under sized. But that's just my experiences.
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