Winchester was apparently going to start producing 20’s then pulled the plug. They may have actually been in a catalog. Probably a profitability issue. There was a prototype made and supposedly it ended up in Cody, WY. I visited there back in 2019 and I wanted to see it. I knocked on the door of the research room and asked the one person working there about it. She left and a guy came out in a few minutes and said yes, they had it but it’s not available for display because at some point the bolt was lost. I would have loved to have seen it.
