I have just purchased a used browning x-bolt in .308 which is threaded 14 x 1
The barrel dimensions are 15.33mm outer main barrel diameter, 13.90mm thread major diameter, 12.79mm thread minor diameter, 3.15mm Barrel thickness measured to outside thread, 12.54mm diameter between thread and shoulder (effective barrel thickness is approx 2.47mm)
Looking for opinions on the following;
1) The existing thread does not extend the full length of the cut and terminates 2.60mm from the shoulder. The diameter of this gap is less than the thread diameter but it is then stepped back up to thread diameter at the shoulder. Is there a reason for Browning not to thread it all the way?
2) Is the current shoulder of 1.4mm sufficient for a moderator threaded 14x1 to butt up against without causing potential alignment issues or impact damage?
3) I was considering having the barrel rethreaded to 1/2" UNF to match my existing moderators, which would appear to be possible given the existing dimensions. However this would reduce the effective barrel thickness to approx 1.75mm but provide a larger shoulder of 2.11mm. Is this barrel thickness reduction sensible on a light barrel .308, albeit it does seem to be a common thread size on other .308 rifles?
Ultimately should I keep it 14x1 and buy a new moderator (or bridge) or have it rethreaded 1/2"UNF to match existing moderators?