Mine was a 30-06 detachable mag, but is now is a 338 Wm detachable. Didn't change a thing except adjust the feed lips a little. Try it, you might not need to change a thing. There isn't a whole lot of dia difference between the two cartridges.

I actually bought the blind mag box and follower, and my old stuff worked better, so I swapped it back to detachable.