Brfor shooting I would look at cleaning up the crown. Depending on where the rifle originated, many were cleaned from the muzzle. One can sharpen the rifling by using a round head BRASS screw, or bolt, and hand drill with cutting compound on it. I`ve done this many times. Improves accuracy. Easy to do.
Check to follower. It should have been modified to allow the bolt to run forward after the last round is ejected.
Drill and tap. Have this done by someone that knows what their doing. Some Mausers have very hard recievers, making this job a little difficult. Also, you want the holes perfectly aliened to the bore.
Do not loose the spacing tube for the rear guard screw!! It is there for a reason. If the stock now is original, and you want to replace, drive the tube out of the original and keep for the replacement. Important in preventing binding of the action, and poor accuracy in the replacement.
Mausers are fun to work on...I`ve more than one.