Re: 338 Edge reloading problem
Well, guessing that's your trouble.
So, two options:
1. Turn em as you said (I hate neck turning BTW)
2. Take the rifle back to the GS and see if he has a reamer that has a slightly larger ND that will fit in the existing chamber without screwing anything else up.
I've done this on a few occasions and I've always been lucky. Just make sure the reamer used has as long (or longer) neck so that you don't end up with some funky Weatherby looking shoulder cause the existing shoulder got nicked by the smaller reamer.