Why is it that there seems to be some unwritten law that bbls must be tightened onto frames with the torque provided by Thor.
Tightened up with any normal torque, decent fitting threads and abutment surfaces,,it ain't coming apart.
Sloppy thread fit and then depending on the bbl shoulder to frame engagement surface to jam the two together is just that,,sloppy work and can lead to a loose bbl. That's no good either.

A TD rifle or shotgun simply threads into place by hand & in many cases is only held by a 1/2 interupted thread. All seems OK in the safety dept. Some debate the full accuracy potential of course.

But having to stand on a 6ft cheater bar slipped over the frame wrench handle to assemble or untie a bbl from a frame on anything only proves it was put together with way too much interference and torque to begin with.
Stuff like these bbl separations from stress cracks result.
The M1917 cracked recv'rs are another one.
They add no benefit to the assembly, only detract from it IMO.