It is no secret that the Third Springfield generation Scope Mount has some troubles. As the mount is Hammered by the recoil of it tends to pound loose in the upright groove designed into the left hand vertical surface of the reciever. The forward screw is now loosens and the zero of the rifle changes. It can never be removed and reinstalled in the same location because the groove to mount placement is always changing.
Here is a cure and it really works well. The rear of the mount is attached to a Blank that replaces the stripper clip. The rear of the mount also has a movable dowel that butts up against this Blank. Have the Blank machined so that the dowel now goes INSIDE the Stripper Clip Blank. This makes the rear Mounting of the Third Gen. responsible for the forward/rear movement of the whole thing. The UPRIGHT raised portion of the Forward mount is then filed off flat and only the horizontal part of the mount is used. The mount can now be removed and installed time after time and retain Zero. I have experimented with removal and installation many times and am amazed how well the mount installs in exactly the same location. If you can't find a cure to your Third Gen. Scope Mount troubles THIS IS IT ! ...............SP/4 Twiggy