Had a .22 Hornet rechambered to K Hornet but that would be a lot less metal cut and the 'smith may have done it by hand.
Heat should degrade thread locker. "When disassembling red threadlocker, the process is a little different than for other threadlockers. The key is to apply localized heat greater than 550° F. Then, once the threaded assembly is hot, the bolt can be unthreaded. Without applying heat to the assembly, it’s likely that over time, a bolt would break before coming loose. "
IowaDon and Deaconllb on Graybeard Outdoors are TCR gurus if you could get in contact with them.