Since there is no reloadable brass cased 5.45x39mm ammunition available here in the US, some shooters/reloaders have resized .222 Remington cases and made 5.45x39mm out of them. Since the head and rim diameters remain that of the .222 Rem., would the result be a “wildcat” cartridge? How would you define this?
A second variation is the use of .224" projectiles in the reloading of this cartridge in stead of the proper .221". Would this in fact make the cartridge