It lives on in the hands of handloaders and the original cartridge has become the parent round for a new development introduced in 2004 , the .204 Ruger .
It lives on in the hands of handloaders , for whom .222 Rem . 
 Mag. cases are still readily available ; and the original cartridge has become the parent round for a new development introduced in 2004 , the .204 Ruger .