For a gander, look at Nosler's data for the 7-08. Thinking 50fps for the increased capacity of the 08 case to AI is about max, keeping an equivalent range of pressure to the standard 7-08.
Nosler uses a 26" barrel for their testing of the standard 7-08. Their figures would make a conservative estimate for 7-08AI velocities with a 24" barrel. As well, for the 7x57 as capacity is similar to the 7-08AI. Again, at equivalent pressure.
For extrapolating to other barrel lengths, Berger's manual gives 21fps per inch as the estimate for a longer or shorter barrel for the 7-08.
A 7-08AI twisted so, and with some magazine room for the 162 amax, looks compelling to me for distance shooting as others have said. Am in process of shaking out same in a particular 24" 7x57.
