Another paraphrase from Old Fuff.
Because when things get to bad breath distance, I can jam a snobby directly into the attacker and not worry about a malfunction because of it.
Unless of course the attacker knows to grip your cylinder and gun frame tightly. Then you are F’d because you cannot fire.
But who would know to do that?
When things are at contact distance, life get quite interesting, so, not as simple as either of these. On the one hand, an opponent might get REALLY animated, if he feels a muzzle jammed against him, so I might not want to use that, as an actual tactic, lest his response be an action that beats my reaction. It is good to know, of course, that one’s revolver cannot be disabled by simply being pushed out of battery. OTOH, if an opponent does grab one’s revolver, well enough to stop the cylinder from turning, or, if applicable, in a way that interrupts hammer travel, one does have a significant problem, that is much more involved than the cylinder being immobilized.
I will say that one has a seriously interesting life experience, if an opponent grabs one’s auto-loading pistol, too. Most auto-pistols will be able fire the chambered round, if an opponent is firmly holding the weapon, but, let’s remember that not many folks are going to allow a handgun to remain pointed at their important bits, and, many felons are acquainted with how to perform a handgun-take-way. They teach each other such things, in prison, during rec time.
A gun-grab is quite serious, whether the opponent is immobilizing the mechanism, or trying to take possession of the entire weapon. A gunfight is a fight, in which a gun happens to be present. At contact distance, we may be compelled to apply VERY forceful actions, other than pulling a trigger. Michael deBethencourt can teach at least one way to defeat a cylinder grab. Craig Douglas, doing business as Shivworks, is one source of handgun-take-away and handgun-retention training, as part of ECQC. There are other excellent instructors who teach this subject matter, but I referenced Shivworks ECQC, because I attended in 2005 and 2006, when Craig Douglas, and the late Paul Gomez, were the instructors.
Yes, I said “take-away,” as one best understands how to retain a handgun by understanding the physics/mechanics of the take-away.