Why waste the money ?Has any chamber pressure testing been done on any wildcats. I have read that for an Ackley the only way to achieve higher velocities the chamber pressure must be higher. This is what I wish I had the money to do. Truly test chamber pressure between wildcats and parent case. Also cutting the wildcat back until I have equal volume in both cases ( parent and wildcat) and see how they perform. Anyone want to pitch in a few thousand.
If you create a "wildcat" say AI style from say a 308 case, that has the same internal capacity as the base 308 and load them up with identical components, shoot them in "twin" rifles, their velocity will be the same. It's basic physics.
The fact that many AI cartridges show little advantage in velocity when using the same powders as the parent, gives you a hint at what your experiment would produce. AIs that work hold more powder and run at higher pressures than the parent.
You might wish to acquire Fred Zeglin's two books on the subject.