Home Forums Hunting & Shooting Gunsmithing Opening the feed rails on a M700

The extractor groove in a 700 bolt face is not round and would be pretty hard to duplicate on a manual machine.

Depending on which bolt I'm opening we just fit an M16 extractor or if there is still undercut left we machine it out and silver solder in a sleeve to get a good solid edge. Then install the M16 extractor. With an M16 extractor on a ultra mag don't forget to make the bolt nose relief large enough to clear the extractor as it jumps the rim on the brass.