Re: Some rebarrel questions
You are going from 30-06 to 338 WM? There is going to have to me modification to the bolt face if I am not mistaken.
There are other options also, the 338 Scovill (based on the 30-06) will push a 200gr in a 24" tube at about 2600fps. From the Barnes book, it lists Varget as 2571 fps for starting and high load at 2765. The 338 WM with varget and a 200gr and 24" tube shows 2652 low and 2877 high.
I don't know of much info available for the scovill besides the barnes reloading book but I am considering a build in that caliber, if the 338WM is readily available to you then that might be better, but there always 30-06 cases to neck up to the scovill.
Also if you have to open the bolt face, then that might change your mind.