Once barrel has been removed, most of the stress is relieved, but some constriction remains. The barrel can then be lapped to remove the remaining choke. The barrel threads may need to be chased to permit turning the barrel up mostly by hand except for the last 5 degrees or so before final sight alignment. Use "service removable" Loctite 242 as a thread lubricant and sealer during reassembly, so that excessive barrel torque is not needed to keep the barrel tight. Remington uses the same product in asembling barrels on their 700 bolt action rifles.
https://www.loctiteproducts.com/en/p...erblue242.html
Loctite Threadlocker Blue 242 is designed for the locking and sealing of threaded fasteners which require normal disassembly with standard hand tools.
The product cures when confined in the absence of air between close fitting metal surfaces. It protects threads from rust and corrosion and prevents loosening from shock and vibration. LoctiteŽ Threadlocker Blue 242 is particularly suited for applications on less active substrates such as stainless steel and plated surfaces, where disassembly is required for servicing.
Prevents rusting of threads
Can be removed with hand tools
Prevents loosening of metal fasteners caused by vibrations
Protects threads
Medium strength
Locks threads