This is Very True !If I was building another, it would have a 9" twist as mine did. You can go 8" twist, but don't think it's necessary.
I don't know what you want to do with it, but don't expect a great jump in velocity over the 338RUM.
Cheers.
I built two 338's identical, 30" barrels , carbon , t-3 Termanator, Remington actions . The 338 Rum and 300 gr bergers hit 2883 ft.per.sec and the 338 Edge 300 hr bergers hit 2884 ft.per.sec.
The Rum , Edge are so close ....it depends on throat work and if you add the +P .
Rum Man