If your talking about a 22-204, it was a great wildcat when I built mine in 2006. A little more capacity than the 223AI, 30 degree shoulder so it feed slicker than whatever, no custom dies just switch out the guts on a 204 Type S FL bushing die, no fire forming, setting the barrel back to rechamber and will clean up a 223 chamber. I hand re-chambered a 223 barrel with a 22-204 Reamer from PTG.

Works great
[Linked Image from imagizer.imageshack.com]

[Linked Image from imagizer.imageshack.com]

Now if your talking about AI'ing the 204 case to make a 22-204AI it is a waste of time as the body is already straightened and the shoulder is already at 30 degrees and 10 more isn't going to give you enough to offset the the cost of custom dies dies and fireforming.

Last edited by erich; 05/11/21.
After the first shot the rest are just noise.

Make mine a Minaska

Heaven has walls and rules, H-ll has open borders