[Rod N. Gunn]

I removed the extractor retainer screw on my top-lever hammer gun to clean and lub the extractor. All went well until I replaced the screw. I tightened it snugly into place, not excessively tight. This rendered the extractor incapable of any movement whatsoever. A half turn or so back the other way and it works perfectly but the screw's kinda loose. Is the the normal condition? Should I worry about it? Should I be more concerned about the onset of obsessive-compulsive disorder?