The theoretical example above was written with the idea that the 325 WSM was necked up to 338. So the powder capacity would increase slightly.
Personally, I couldn't find any solid info on anyone who'd actually built one. So I ran some numbers through a calculator and that's what I ended up with.
To my best guess, the MV of 2700 with that big Berger bullet was pretty optimistic....lol.
But hey, who said barrel length had to be under 36 inches?