Converting the Remington 700 bolt to take the Sake or M16 extractor seems to be a pretty common thing. It looks like when opening up the bolt face, as you want to do, it is easier to do this conversion than re mill the bolt face to take the original Rem 7oo extractor. Here's a Link. https://rifleshooter.com/2016/02/ins...0-model-seven/
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