I would not go .408 unless you can get a 1-11" twist barrel, 1-13" is too slow to stabilize the 419gr Cheytac bullets. With currently available barrels and bullets .375 is definitely the way to go.gun)
Curious about this post. My rifle, and according to Cheytac's website all their 408 rifles, has a 1-13" twist. Why would they sell a bullet that won't work in their rifles?