If you look at the history of the caliber, the 22.250 just didn't have the juice capacity to get a 48 grain bullet out the tube @ 4100 fps safely or it would have been the Swift. Didn't cut the mustard. Ackley just rectified the short coming.
22.250 AI = 220 Swift.
If YOU look at Dude270's original post, he was asking about the 22-250AI. Go argue somewhere else.
