In field failures:
Pre-64 M70, trigger broke off just above the curved part of the trigger.
Mauser G33/40, the extractor broke off about .25” behind the front of the extractor (in front of the retention ring).
I have never had a failure of any sort with a M700.
Scope failures, Weaver 4x, Redfield 4x.
Never had a failure with any Leupold since I started using them in 1969.