There is no easy answer Alan.
Are the barrels pattern welded or Nitro Steel?
Was the L barrel honed for pitting? Are there pits now?

Dealers unfortunately list MWT numbers without mention of the location of that wall thickness, and without even more critical wall thickness measurements: forward end-of-the-chamber, the forcing cone & 9" from breech.
If the dealer is unable to provide those numbers, I would certainly demand a right of return after those measurements were made if found to be inadequate.
.023" in the distal 1/3 of the barrel is usually not a concern as the pressure is typically < 1000 psi. There would be some increase risk of dents however.