I own one CZ527 and have blown the bolt face off twice, requiring new bolts.
I have 98 Mausers and they don't seem to have that problem.

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Roy Bertalotto gave me help 15 years ago on the Yahoo gunsmith forum when I started rebarreling rifles. He is a stand up guy.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps