I would be interested in this new cartridge. Not because I have any use for it. But simply because "I don't have this cartridge" yet. Many folks try to consolidate on only a few standard cartridges. I'm not like that. However, it seems premature to predict it will replace all the other rimfire cartridges out there with zero real world experience behind it. If it just supposedly came out last month, then only a small group of very lucky people would have ever seem it, let alone shot it. Even fewer would own it and be able to report on it.