[dipper]

Remington 700 extractors have and will fail but it's not a big concern and doesn't happen all that often.
I personally would not recommend the Sako modification to a Remington 700.
The 700 action and bolt ARE NOT designed for a Sako type extractor.
Yes, they can be installed, and will work, but if you EVER have a failure, that Sako extractor can end up in your eye.
MANY knowledgeable gunsmiths will not recommend the modification.
The Sako bolt and action are a different design than the Remington and are made with the use of their type of extractor in mind.
The Sako extractor is completely safe in a Sako, not so in the 700.
Look at the bolts from each rifle and you'll see why.
Both rifles are very well built safe designs if left alone.

Dipper