Not having a 22-250 or a 22-250AI I can't speak from experience. So take what I say with that in mind.
With the increased powder capacity in the AI you can expect more blast, but increased velocity. Barrel life could be expected to be a bit less. I guess it's the trade-off on should expect. A heavier bullet could be used with the gain in powder capacity, but one would have to look at the rate of twist to stabilize them.
As far as Brownings claims...remember that they are trying to sell a product. So take their claims with care. I would listen to shooters who have this caliber before listening to a manafacturer's or gun writers claim. I have never read a gunwriter who doesn't like a gun or caliber. If they wrote bad about it they would be out of the perks they get, and possibly a job.
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