A few months ago, I would say the 223 only. I still might due to availability of components. But I have been working with a 204 and can't believe how that little sucker performs. Its as flat as a 22-250 with a lighter bullet. When I worked up some loads, I thought they were bogus. I was .75" high at 100 and 1.5" low at 200 with .5MOA performance.

I was shocked.

Either way you can't go wrong. They claim, (they say alot) that the barrel life will be like a .223.