About to rebarrel a model 12 to 260 rem. I am looking for some insight to the advantages of an 260ai verses regular AI?

I do reload, I have a couple hundred rounds of new Laupa 260 brass. And don't have the barrel yet.

The rifle will be used for long range steel plates as well as any competition can be used in! The only problem I see is I will also be reloading the 260's for use in an lmt mws gas gun. But I have not found any reasons the AI will not work In it once the barrel is reamed for such?

I would appreciate any guidance from anyone with experience in the AI cartridges. I have never dealt with any.
Thanks in advance!