I'm aware that the snubbie is capable of making 25 yard shots. There are some guys that make amazing shots with snub nosed revolvers at great distances. If I work at it long enough, I might be reliably accurate at 25 yards with it myself. That's not the thing though.
For me, a snubbie is a close in weapon. It's a fighting gun, and a darned good one. It has stood the test of time for a reason. It's a weapon that fits the problem. It has some great attributes. It conceals well, is extremely reliable, fast on target, and it will fire with the muzzle jammed into the ribs of a man beating the snot out of you.
And you see, that is the issue, really. Almost all fights, and most lethal encounters start at a range of ten yards or less. Conversation distance. I carry the snubbie for personal protection, not exhibition shooting. I figure the chances of someone standing in the open, shooting at me from 25 yards is pretty remote. By contrast, having to defend myself from a range of fists and lead pipes to 20 feet against a moving aggressor while I am moving myself has a higher probability. As a civilian, having to defend myself from my back after being hit in the head from behind is also fairly high. Thus I train in that fashion. I practice at ten yards, often less. I practice from concealment against a timer, while moving. If possible, I use a target that moves as well. I practice shooting one handed, weak handed, and from the supine position.
The most important consideration for me is five shots to a reload, and a cartridge that is on the relative low range of effectiveness. I want shots in my target fast from concealment. I want this done before he gets shots in me. I want to be getting myself towards cover for a reload or an escape at the same time that I am defending myself.
If I am forced to deal with a maniac with an AR at 25 yards, then for me it's a question of tactics. Take cover. Either advance behind cover to a more effective range, or draw them in to effective range and ambush them. But...... at 25 yards in most environments that an attack would occur in, escape is a more healthy option than engaging the aggressor.
But then, fighting is always a question of tactics, in theory at least. Maximize the effectiveness of your weapon of choice while diminishing the VA's effectiveness. The subject is engaging to discuss, and it provides a guide of action and training. Mike Tyson once said everyone has a plan until they are punched in the mouth. He was right about that, and he knew fighting pretty well. Thing is, Iron Mike wouldn't want to face a maniac with an AR at 25 yards with only his fists. He would die if the maniac had only an ounce of skill or luck. If Tyson could take cover behind a brick wall and ambush the maniac when he came looking for him though, he might stand a chance. If he could stay inside the arc of the AR's barrel as he beat the maniac's face to a pulp, he would likely live. I strive for the ferocity of Tyson when attacked, but I don't have his strength, endurance or skill with my fists. So I carry a gun instead. Chances are, a snubbie up the nose will be a passable substitute.