@ 01:01 pm (GMT)
Mark WhitakerThe A-MAX works fine in my 7mm-08.
As I said in the first post, l'm looking into the theory of twist rates.
Another example would be the 338 Federal. In Nathan's second book, he says this would be a great long range calibre with the Rocky Mountain 225gr. 2800-3600 fps, ideal twist rate is 1:11. These velocities are ok for 338 lapua or Edge, but at 2400fps of the Federal then a faster twist rate would be better.
As I said, just trying to understand the theory.
As it's been stated in another thread, Nathan's Long Range Calibre book make great reading and re-reading.