Labowner is right but if the screws were filed and polished to the action or trigger plate they will be lower. You can use a very small punch that has been ground to a point. Very carefully take the punch and around the surface of where the screw will come into contact with the plate or whatever strike that surface. I reciently did this to an Ithica single barrel trap gun and it worked. I don't think this is a "fix" that will last as the upset screw surface will no doube wear back to the original surface. You don't need to strike the punch very hard and watch out for damageing the screw hole. Striking to hard can distort the screw hole.
Just my two cents.
Regards, Gordon
