I'm glad that you wrote back. I wrote in a previous reply that I had installed an MGM barrel in 300 WinMag for a guide in Maine actually. I just texted him and asked about the ejector issue you are having. He said that he places the shell into the chamber, closes the action and that is it. He further said that when he opens the action the shell is sitting there waiting to be pulled out of the action/chamber, fired or unfired. I would definitely call MGM, you have a malfunctioning of some sorts. Sometimes that is the problem buying used stuff. I just bought a used Ruger 77 tang safety from the interweb. Fortunately for me I had the parts and experience to repair it, otherwise it would have been an expensive proposition. Good luck with your barrel. I would like to add that sometimes a follow up on any remedies are helpful to others experiencing issues like this one.