sorry to jump in here, but i am contemplating a 300WM build, and was wondering what kind ov velocities you can expect form a 20", why not just run a 20" 308? again not trying to be a jerk, just trying to gain an understanding of the 300wm cartridge.
I was thinking a 28-29" win mag, try to push the 230's near 2900 if posible... i am looking for long range target use.
not trying to hijack your thread, just thought slow burning powders out of such a short barrel would be a weste...