While some of the "post" 64 Model 70's display the "force" you speak of, the beveled extractor on the pre- 64 CRF model 70's "were" designed tuned for single round feeding. The spring body is properly tensioned, and the claw hand shaped for seamless feeding, and maximum rim contact area . This is one of the several differences in the Pre-64 design that drives my preference for this action. Based on my experience with all my pre-64 Winchester's, I have seen no damage to the extractor nor case damage. These actions are on track to easily exceed my lifetime......40+years of use. My push feed-spring, and M16 design extractors will have been replaced more then once over this same period...with far more brass/rim case wear. Even if a shooter were paranoid about single feeding a CRF, it takes all of and extra second to push a cartridge into the top position of the magazine. The rim of the cartridge will slip the rim under the claw when the bolt is closed. Not a big deal for a rifle intended for hunting. IMO.