22-40

Dies are gonna be tough to find. My be able to use 222 Rem. Mag Ackley Improved dies. Some dies can be made by sending in fire formed cases. $$$$
 
I have a 222 mag imp made up in a TC, about 30 years ago. It's like having a 22-250, great round, great brass. Rem made the brass, and I think nosler is making brass now for it
 
You may have to cast the chamber and send the casing for custom dies. Not cheap but an interesting ptoject.
 
222 mag imp
20190821_143022.jpg
 
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