Sounds like the OAL of the casing is to long if the bolt won't close. Does it happen with factory ammo or handloads? I have never had a problem with an extractor. As a matter of fact I kind of laugh when I read about people who spend the money to put "Sako style" extractors on their Remingtons. I have a 700 Classic in 30-06 that is pretty particular when it comes to ammo. It doesn't like anything close to max OAL. It becomes hard to close the bolt.