In my not-so-humble opinion, "Bobbed" and "Hammerless" revolvers are nothing less than a waste of tactical advantage, which is what defense with firearms is all about.
In this post, esteemed gun-blogger PawPaw writes about how he gave a Smith MDL 60 to a family member, and she shortly complained that carrying it caused the hammer spur to dig into her body, and the solution sought was to bob the hammer spur off. With all the gun-talent in that family, they evidently did a nice job of cropping the hammer, but doing the job in the first place bothers me enough to write about it.
Why not sell the gun, and get a revolver with a shrouded hammer? These have vestigial spur on the hammer, can still be cocked for single action, but don't rub holes in your flesh if you choose to carry IWB.
There is just a little checkered stub of the hammer showing on that Smith, and the shrouding offers the advantage of adding some weight to the firearm, for steadier shooting.
There is HUGE tactical advantage of single-action fire, well aimed, at a distance from the target.
It is a somewhat extreme example, but I have made 4 out of 6 hits with table-supported single-action fire on a man-sized target 300 yards distant with my Colt Anaconda 44 Magnum, shooting factory 240-gr JHP. When I carried a .357 Magnum Ruger Security Six 4" on patrol duty, I was required to be able to put 5 out of 6 on a man-silhouette, using single action, two-hand Weaver, at 50 yards. Towards the end of my duty-revolver days, just before going to a Glock 17, I routinely warmed up for that qualification stage at 60 yards, the max range available on our Sheriff's tactical pistol range.
I, too, carried a Smith & Wesson Model 60 on duty in the olden days, both as a second gun in a pocket holster sewed into the pocket of my winter prowl jacket, or OWB holster under a blazer if I was working plain clothes. My only modification to that gun was done by an expert armorer, who put an outstanding "action job" on it while he and I worked the Front Desk in the station-house one evening. I later put neon green dots of paint in the rear sight channel, and painted the front sight orange neon. Foolishly, I sold that gun when I went back on Extended Active Duty in the USAF in 1979.
Today, I have a Ruger SP101 five shot two-inch. It is a heavier revolver, has a fine spur hammer on it, painted sights, and I can easily hit the man-silhouette at 60 yards with it.
Yes, with very long practice and continued familiarization, you can get ALMOST as good double-action results with a revolver as you can with single-action, but most folks don't have the time or ammo to do those hours of work. One fifth of that work on the range with single action and you are safe and proficient with your revolver.
Most who carry snubbie revolvers are confident people: confident that they can get the job of defense done with 5 shots. That confidence level increases markedly when proficiency at longer ranges is attained, and that calls for single action practice.