A lot of you all have made great points for both sides, and I really appreciate the input from everybody.
I don't think there is a "wrong" answer between the two, but for what I want to do, I think the 243 AI may suit me better.
I have no problem shooting FF loads, as I have other ackleys and Ive always gotten great accuracy and equal to or better than parent case velocities while fireforming.
Lack of trimming is a plus, but I doubt the CM case grows much either, with it's sharp shoulder.
I agree that between the cheaper bullets of the 243 and the longer barrel life of the CM, it's a wash or very close to equal.
Honestly, less recoil is a big plus. along with the fact that I have a lot of 6mm bullets already.
Jordan, thanks for your well thought out answer. It put a lot of good points in black and white
