I saved a list of screwdriver tips posted by John Boy a few years ago that included this:
Tip sizes for '73 Winchester
180-4
210-3
240-3
240-4
330-3 Added: Magazine Plug
340-4
340-6 butt Plate
At work we use Brownells screwdrivers more-so than drivers with interchangeable tips. If I recall, the #5 is good for the carrier and lever spring screws (that one is good for SAA's too), #7 for the side plates and lever. #13 and 16 for upper/lower tangs and buttplate.