G'day Bob,
Just had a yarn with A G, and he has filled me in on how much work he puts in to such developments, referencing QuikLoad, tightening tolerances, load development, range testing. He indicated that of you wish to contact him directly he can go into details far better than I.
If you wish , contact him directly, he has given the OK for me to pass that on.
Mate you are going to have fun working up loads for that one as well.
A bloke in OZ necked up a 280AI case to 375 and is getting really impressive velocities. I wonder how the same case would go at 35 and 400. More capacity than the Whelen and Whelen AI case. Interesting.
Bob