I'm looking into the .22-204.. It's way better than the .222 mag.
Now you talking good stuff...
Will a .22-204 reamer clean up a .222 Mag chamber?
If so, you have better selection of brass, a tad more case capacity and opening the .204 to .22-204 is super easy. No fireforming needed.
But, I'm more than a bit prejudiced...
DF