I have had a CZ527 for 5 years.
I have fired it 10 or 20 times and blown the bolt face off twice.
If the case head fails, the little parts gas cut real fast.
It is not a tough gun, like a Ruger #1 or a break action.
Those were necked down 30 carbine case heads that were not supported to the web. The barrel has since been set back, the chamber reamed, and a different chamber chamfer made.