Use a machine screwdriver, not your household wood screw "V" screwdriver.
See picture:
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Since your screw seems stuck - you don't want to use the wedge shaped screwdriver because it will only contact the screw at the bottom [no help unscrewing it] and only at the top edges of the screw. A proper sized machine screwdriver bit will make contineous contact the full depth of the slot on both sides of the screw and prevent damage to the screw itself.
As a side note: I happen to be a gunsmith. My pet peeve is people that use household wedge type screwdrivers on the screws of their guns - which ALWAYS damage the screws.
Hit it with WD-40 and let it penetrate w bit before trying to loosen it. Should break free pretty well.
See picture:
Since your screw seems stuck - you don't want to use the wedge shaped screwdriver because it will only contact the screw at the bottom [no help unscrewing it] and only at the top edges of the screw. A proper sized machine screwdriver bit will make contineous contact the full depth of the slot on both sides of the screw and prevent damage to the screw itself.
As a side note: I happen to be a gunsmith. My pet peeve is people that use household wedge type screwdrivers on the screws of their guns - which ALWAYS damage the screws.
Hit it with WD-40 and let it penetrate w bit before trying to loosen it. Should break free pretty well.
