Originally Posted by musketshooter
A loose primer pocket or oversized flash hole was probably the culprit if the ammo was skillfully loaded. The 721 extractor is the weakest part of the gun. I recommend the installation of a SAKO style extractor. The bolt lugs should be slightly greased to avoid gauling and hard primary extraction.
i have to disagree about the clip extractor. that same design of extractor made it's way to the M725 which was just a fancier and nicer version of the M721/722, which in turn also made it's way to the M700 when it was debuted in 1962.
though i have never owned a M721/722, i have owned many, many M700's over the years, and have yet to see an extractor failure yet. that clip extractor design has been around since 1948. that's over 60 years with that design and millions of rifles from the M721/722, the M725 and the M700 that has been using it.
even if it were to fail, it can usually be fixed quite easily with the proper parts. which would be much cheaper that having the bolt modified for a Sako type extractor kit.