Here is an example of the classic Smith and Wesson "N" frame Model 27. Being a "dash 2" this is pinned and recessed, meaning the chamber mouths are counter-bored to accept case rims and the barrel is secured to the frame by a pin. The "N" frame is strong and will accept hot loads well, although I tend to prefer using reduced loads for quantity shooting.
This long barreled version is not that convenient to tote around compared to shorter versions but I fancy there is a small gain in accuracy, as well as providing the benefit of a very nice long sight base. It does make for a very fine long range shooter.
Gobango.net web site - see this picture and many more, plus articles.