First off, I am no gunsmith, however, looking at my ejector pin in my Remington 722 222Rem, it does not seem correct.
1. The ejector pin is straight, like a dowel, believe they are stepped to a smaller diameter approximately 1/3 of the way from top to bottom. It is exact depth of the recess for the ejector pin.
2. There is a depression for the retaining pin in the ejector pin, but only large enough for the retaining pin. I believe this is to be a channel to allow the ejector pin to slide in and out, with spring tension.
3. Last but not least, there is no spring in the ejector pin recess.

Any ideas? Yes, I've been researching purchasing a new ejector pin and spring, but can not find one. Will other ejector fit? Or talk to a machining buddy to reverse engineer a new ejector pin?