How would you all feel about putting the .333 Jeffery chamber into a .338 barrel.
This size bore is easy to get and the difference is miniscule. It's about the same difference you get with the older rifles anyway, with some of them being well overbore.
When I get the PTG reamer, I'll be measuring the neck clearance, but I think there will be enough anyway, to allow the .338 bullet in the neck without any modifications to the chamber.

Afro