FYI after fooling with a couple of 22BR's. You may want to check and see if it was an early one cut for RP brass. There are still reamers out there floating around for RP brass today. Buddy had one built and did not specify brass to be used, ended up more work than he planned on.
Also neck wall thickness can be all over the place.
Other than that it is a fine cartridge and doesn't receive attention it deserves.