Re: What about a 30-338 Win - Ackley Improved?
it is basically the 300 WM with a longer neck. Yes it has shown "slight" advantage over the 300WM, but not much.
I do not think that you will find that it lends itself to improvement, accuracy and long brass live.
For simplicity sake go to 300 Weatherby with minimal freebore set up with min SAAMI specs. That is a more powerful round and just as accurate as anything in that power class, plus excellant stock brass and dies.