Should be easy enough for you. Min bolt head face to barrel face spacing should be around .005 for reliable functioning. Most Stock Savages are in the neighborhood of .020 or more spacing. You can take that .005 measurement and the measurement of the depth of the bolt face and use that for your headspace gauge protrusion number. You would then ream your chamber until the headspace gauge protruded THAT amount. Then you should be able to screw the barrel down on the headspace gauge and lock it down as normally you would do. Would give you ZERO headspace with .005 of space between barrel and bolt face.