This has a 222 family head but is not a wildcat...350 Legend. Basically 223 basic brass (or nearly so) with 35 cal bullets. Winchester is making ammo for it. Came out at Shot this year kind of a SAAMI version of the 357 AR....
I think the 350 Legend would be wonderful in a Kimber M84, but getting it put together would probably take a long time to get ammunition or even brass for it.
I can't complain too much, though. It's wonderful to be able to use a rifle instead of the really awful slug shotguns I suffered with for years. The Savage 220 was a wonderful exception, but around $3 per shot was a real downside.
