tower06 and Calif-Steve.
It is difficult to give relevant advice if one doesn't even know in which country you are located. In Germany it is no problem to get the correct trigger guard screws. Elsewhere, Evans Obsolete Screws (as suggested by Badger) is an obvious possibility. And you don't need a gunsmith to cut a screw thread for a trigger guard screw. For myself, I would never try to recut the boss on the system to a different thread. That woul dpresent enormous problems with residual wall thickness on the boss and trigger guard screw holes. Up to now, the most I have found necessary was to clean out the thread.
The old dodge for this is to get hold of one of the correct screws and grind a slot along the side, to make it into a crude one-flute tap. This can then be used to clean up the female thread in the threaded boss.
jmoore: 1909 screws are no different from any other of the Gew98/Kar98 family, as far as I can tell. But your question is a good one. I have never actually seen a table of Mauser screw usage. If I find one I shall certainly make it available to the forum.
Patrick
