09-21-2011, 09:18 PM
If the next diameter is tighter than a true 6.5 Grendel chamber, you can run into problems with feeding, since some brass might be on the higher end of tolerance (but will still run in a Grendel chamber), then won't fit the chamber in a .264 LBC. If barrel-makers stray from the real chamber dimensions, don't expect reliability.
