Enfield No 5, stuck screw advice?

[72 usmc]

see link:
5 ways
Gunsmithing: 5 Ways To Remove Frozen Screws - Gun Digest

Drilling


More ideas:
Gunsmith Price Check: Removing a Stuck Stripped Screw | Survivalist Forum


also see which oil to use: Tips for stubborn seized Milsurp screws! - Surplus Rifle Forum - www.surplusrifleforum.org

I recut the slot with a dremel after soaking for a week. The I use an antique electric soldering iron to heat the screw and try to turn it after 10min of heat. I twist it tight, I twist it off to see if I can get movement without to much force that will destroy the new slot. No movement? I use spray penetrating oil to cool the screw and give it a smack on the end of the screwdriver. THEN REHEAT Again. Try to get movement. Smack the screwdriver while in the slot and the screw is hot. See if you get movement? cool it with penetrating spray. Let it soak with kroi oil for a day. Apply a dropper two every hours and let it soak it. Then then next day smack, heat, turn and see what happens. You may have to drill the sucker out. Be sure you use the largest iron the will heat the screw, not the surrounding metal or wood. It may take 15 min of heat to get movement or allow more oil to soak in.