Originally Posted by Slee1195
Guys, there's no doubt that I'm making a 7mm-08 out of the rifle. I had that decided before I made this post. The whole point of this thread was to find out what would need to be done and potential problems that could arise, not to do with machining and other human error, but the fact if it could be done or not. Simply put I'm not interested in what round you think is better, hence the whole "gunsmithing forum" that this thread is under. I do respect all of the input you guys have put in, it's just not the kind I'm looking for.
I might point out that *you* started comparing the two cartridges by saying that the 7mm was more "ethical". But enough beating that dead horse.
The 7mm/08 is the 308 necked down to take a slightly smaller 7mm bullet. Since the basic case is the same, there are no modifications needed to the bolt face or feed rails / magazine. All that's needed is a new barrel.
It's important that the headspace be correct. Most rifles set the headspace (the amount of clearance allowed for a standard cartridge) by cutting the chamber to fit. Therefore a chambered barrel from another rifle might
fit and be headspaced correctly. Then again, there's a good chance it won't fit. A skilled gunsmith can make a chambered barrel fit on another action, but it takes some work.
You would be better off to get a new unchambered barrel and let the gunsmith cut a new chamber to fit your rifle.