Doc AV method:
1. Soak for several days in Kroil or similar releasing agent.
2. Try normal screw driver using drill press to exert pressure ( Chapman or Webster driver with ratchet wrench)
3. Try Impact driver
4. Try heat applied to Screw head, cold pads to rest of Rifle. ( expansion and contraction can break rust.).
5. Retry Impact drivers.
6. If by this time, screw won't budge, or is Mangled beyond saving, Centre screw in drill press or Mill/Drill table, Mill out head with a 5/16 end mill ( head will come off) and drill out screw with 7/32th drill: Then Pick out the remaining screw from the threads (Mauser screws are 1/4x22TPI.) using a masonry nail sharpened to a "point" to chisel out the remaining screw threads.
7.Clean up threads with a 1/4x22 Tap from Brownells; replace "Boogered" screw with Brownells screw or original (mismatching) Mauser screw.
Good luck...
Doc AV
AV Ballistics Film Ordnance Services.
brisbane Australia.
1. Soak for several days in Kroil or similar releasing agent.
2. Try normal screw driver using drill press to exert pressure ( Chapman or Webster driver with ratchet wrench)
3. Try Impact driver
4. Try heat applied to Screw head, cold pads to rest of Rifle. ( expansion and contraction can break rust.).
5. Retry Impact drivers.
6. If by this time, screw won't budge, or is Mangled beyond saving, Centre screw in drill press or Mill/Drill table, Mill out head with a 5/16 end mill ( head will come off) and drill out screw with 7/32th drill: Then Pick out the remaining screw from the threads (Mauser screws are 1/4x22TPI.) using a masonry nail sharpened to a "point" to chisel out the remaining screw threads.
7.Clean up threads with a 1/4x22 Tap from Brownells; replace "Boogered" screw with Brownells screw or original (mismatching) Mauser screw.
Good luck...
Doc AV
AV Ballistics Film Ordnance Services.
brisbane Australia.
