Thank you Gary. A few more data points are always helpful.
With those dimensions, I would be tempted to call it a '.22WCF' as it used a nominal .228" bullet. Whatever it is called, you are getting some very fine results.
Fired cases from my rifle seem to be neither fish nor fowl. They definitely are not Hornets but don't seem to match the dimensions I have for the Vierling either. So, I am back to a chamber cast (which I have not done). Oh well, the fun is in the investigation and experimenting.
Like you, I have a fondness for petite scopes on the little rifles. I am very partial to the Weaver J2.5/J4 scopes. Very good optics and a proper size for a trim rifle. The Redfield Mini's are also dandy little scopes. I expect there are European counterparts but I have no experience there.
