Yondering,
You really aren't getting it: As I stated in one of my earlier posts (and Ackman repeated), you fire-form while shooting prairie dogs. There is no "extra" wear on the barrel.
No need to get rude. You seem to have assumed I don't know anything about it and need to be convinced, but as I already said, I like and use other AI cartridges too. I "get it" just fine, I just don't share your opinion.
I don't think the 243AI offers enough difference over the standard 243 to be worthwhile. You do, apparently. We can disagree on that, it's just opinion, not facts.