I have to disagree with that statement , a revolver can be unreliable if subjected to abuse and neglect , back when I used to run the Pistol range down in Brisbane I would see lots of revolvers subjected to so much neglect that they wouldn't work , here are a few examples .
A security officer turned up at the range to have his 5 yearly practice session and when he went to open the revolver and place it on the bench it wouldn't open , he decided to fire it first and jar what ever was stoping it from opening loose , as range officer I stoped him and inspected the firearm , the cylinders and barrel were filled up with a mud wasp nest .
Another security guard turned up with a gun that wouldn't shoot and it turned out to be so filled with lint and dust it just couldn't possibly work .
Very big fat policeman turned up a the range and his gun wouldn't fire , seemed that his maintenance program to stop the gun rusting seeing as how this man would manage to sweat profusely in a freezer was to take the gun and holster and spray it with penetrating oil every day , so a year or two later the oil had managed to penetrate the primers and the rounds were no longer viable ,
Another policeman turned up at the range and his gun wouldn't open , seems the problem was that after years of neglect he managed to top it off by getting the gun soaking wet in salt water about a year before and hadn't bothered to do more than wipe down the outside , the inside was rusted shut and the little springs and bits inside had turned to red dust , the cartridges had grown onto the cylinder walls .
Any of the above is just misuse and any kind of weapon would not have functioned,
D Wallace I ran a local range here for over 15 years, the malfunctions I saw on this range were way above 100 to one in favor of the wheel gun , a revolver is not perfect ,nothing is ,but a revolver is way more reliable than an auto.
Little things stopped the autos, changing ammo was a big thing, in the autos ,if it would get out the end of the barrel the revolver would just keep fireing.The Glock was a hot seller a few years ago but i saw them malfunction a lot with small guys and women
Bear at close range 20 ft or less,room size , the birdshot will stop a man faster than a slug that blows thru him,and leave a much more vicous wound and believe me it want stop at the skin, I have seen what birdshot does up close and buckshot and slugs, I was a medic in Nam and worked in a Mash hosp that had a pow ward , It aint good from any of them but there is a definate difference in the wound channel.
Use what you have cofidence and expertise with and hope you never have to use it.
Ron