I've been using the 222 Magnum. Parent case for the 204, the 223AI before the 223 existed and the benchrest lineage of the std. 222.
Its a good step in between the 222 and the relative fuel/steel hogging 22-250, Swift and varmint 6's. With its longish neck and miserly volume, it might wear a barrel throat a trifle better than some of its contemporaries and case stretch isnt even close to the 22-250/Swift either.
I think the military effed up on the cartridge selection; varmint shooters dont have to...
