I would never rebore a perfectly good rifle just to change caliber. I got the first 338-06 because I somehow ended up with a Remington 700 in 270 that wouldn't hit a barn from the inside with the doors closed. Since I didn't know of a lake deep enough to drown it where some idiot would not fish it out and try to use it, and since I need a rifle to gift a Grandson I decided to convert it
Damn thing came out so good I had to have one for myself, so I found a newly barrelled action, dug up a stock and pretty soon I had a shooter, later on I bought another
Now I have three in my safe, along with a 338-08AI and a Ruger 338WM. I did have another custom model 70 338WM but gave it to another Grandson.
That pretty much makes bullet purchases easy, all I need is Nosler and .338