The 10/22 magnum model was just discontinued not very long ago. I remember reading about it but don't remember the date. Ruger was not impressed with quality I remember reading.
And yes, you can convert a 10/22 to a magnum. It has been done two or three times that I remember reading about on RimFireCentral. Search for it there and you will find the threads somewhere. If I recall, it didn't sound at all worth it.
January 6, 2008, 02:52 PM
Here are a couple threads from RFC. Looking at the amount of work that the conversion requires, I'd agree that it's not worth it when aftermarket receivers are available.