Originally Posted by Clarkm
Looks like diminishing returns of overbore.

A series of optimal efficiency cartridges;.., 223, 308, 8x57mm, 338-06, ..

And 338WM is already a hair overbore.
After than more gets you less. Burned up powder and barrels for almost insignificant improvements in velocity.


Looks like you already had your mind made up before you asked the question. If you like the 338WM fine, I will stick with my 338LAI