So, 223AI... Is the juice worth the squeeze or better to just step up to a 22 ARC or 22CM if you want to send bullets bigger than 77tmk? I've got a CZ in 6.5 Grendel that I couldn't get below 1.5" which was not my experience with the Howa Mini Action 6.5 Grendel rifles I got for my kids. That rifle would be a good candidate for a new barrel in 22 ARC. The velocity I've seen claimed from guys shooting the 88 ELDM in both hand loads and factory rounds has me intrigued.
Jay
Jay