I knew PO Ackley personally, he was a great guy to chat with and had some very good idea's. I really enjoyed my time in his shop with him.

Abovethere aretwo oposeing opinions, and i can only tell you what experience i've had with AI chambers.

First off, for me theonly time i gained big was when it was with something like the 7x57 mauser, any cartridge that was pretty much maxed out in the first place (case capacity wise) didn't gain near enough for the bother of makeing cases.

For me, on 30-06 size cases, i just didn't gain all that much, and personally i wouldn't make up another one today. My feelings are, if i want more velocity, i'll just start with a bigger case in the first place.

As for case life, i really didn't notice that much improvement either. In fact, ifi didn't load to the absolute max all the time, i really didn't notice any improvement.

Ackley tested his cartridges at absolute MAX pressures, and on top of that, many times he had 28 to 30" bbls to get max Velocity...

He was a great guy and in many ways ahead of his time.

Drilling Man