Some would think ,if you are changing over to a Sako type extractor you should be able to install a 223 bolt face bushing at the same time. A bushing is added to the bolt face when cleaning up the Rem extractor recess , as part of the Sako extractor installation process. This presents the opportunity to select the size of bolt face you require. However there are inherent safety issues with the Sako extractor installation on Rem 700 bolts ,that must be taken into consideration before undertaking this modification . See thread " Does this Sako extractor installation on the 700 look like it is done correctly?" After reading the article I would not install or use a Sako type extractor on a Rem 700.
A new bolt from Pacific Tool and Gage is a practical option which allow for oversize diameter , spirals etc.
You have lots of options with a new bolt.