One of the first things that custom rifle builders do is replace the entire extractor claw on M70s. I believe that it is because they are prone to bending, due to being made out of cheap steel. One only needs to look at the number of machining operations required to make a M70 operate flawlessly (i.e. to the very limit of its design capabilities) to question whether "adequate" is sufficient on a PH rifle, the job of which is after all to save lives. Just ask d'Arcy Echolls...

For what its worth, IMHO, I don't think that the Mauser M98 is faultless either, although it does have a proven reputation. Personally, I would pick a Heym express - if I had the cash