Has anybody done this yet? I see Hornady has the dies out, with Redding "coming soon".

Sounds like all the rounds will need to be fireformed too, since the shoulder is bumped out? Am I right?

Thanks for the help...Eric

snoogans, I picked up a 5 boxs of the .204 Ruger ammo and yes the shoulder is going to have to be moved forward by fire forming if you want to use 222MAG brass. I have a boatload of 222MAG brass that I was hoping to use but I think I'll just use the 5 boxes of factory loads to start out with till brass becomes available. The .204 actually beside the 222MAG case looks like a "222MAG Ackley Improved"! I can't wait for the rifle to get here!!! GHD