The safety works by camming the striker to the rear. The cam ledge on the safety engages a small slot in the top of the striker and forces the striker to the rar and off the sear.. Grinding the sear is NOT indicated unless the safety won't move because the striker is too far to the REAR! If the striker is too far farward the ledge on the striker can be moved a bit to allow the safety to engage. I don't see how the rifle can fire if the safety is engaged..and these are 3 position safeties.. right is fire, straight up is safe but the bolt can be opened, left is safe and the bolt is locked.. What is your situation? I cringe when I hear the term grind applied to a sear surface unless and precision machine is also involved!