Gunsmithing Converting a 338 win mag to a 338 lapua?

You would need a new action and bolt (and possibly a new stock that takes 338 mags) and have the barrel set back and re-chambered. You are better off selling the 338 Win and building a 338 Lapua from scratch or buying one off the shelf.

Pretty much all you could re-use of the 338 win would be the barrel and the trigger.
 
Not necessarily. You could get a ptg bolt and just re chamber it, might not even need set back. This is assuming it's a 700. If it's a detachable box mag you just need non cip Lapua mags then.

Not ideal setup but it works, custom actions with 750 diameter bolts are little better suited to the Lapua.

Galaxy S3 on tapatalk