Go to about 3:20 of the video and I think you'll change your mind.
https://www.youtube.com/watch?v=ucjwnPRicQw
I have fired the .500 S&W...not with the T-Rex 700 grain, as I consider it to be a totally useless round, good for nothing more than making Youtube videos with, but with a 410 grain hand load.
Nothing special, in and of itself, as the powder load is the deciding factor in how much the weapon pummels your hands.
It takes much more to effectively launch a 710 grain projectile than it does a 410 grain projectile.
And that is yet another argument...for a later time, perhaps.
Again, I have not seen anything or experienced anything or heard from anyone, of an incident that would tend to support a report that a loosely held revolver, regardless of the round, would rotate and discharge a SECOND round, by virtue of the recoil, directly back at the shooter.
Granted, place that weapon in the hand of an unprepared and physically incapable person, and it would most likely either recoil into the forehead of the shooter, or it would hit the ground, with a SECOND round unfired, probably to the left of the shooter, if the shooter was right handed.
There would most likely be tissue damage and a broken bone is a high probability.
Anyone that does that intentionally to a person not otherwise qualified, is, in my humble opinion, not only a true dumb ass, but has committed assault and battery.
If you will reread that portion of what I said, that you quoted back to me, you see that I specifically stated: "ignition of a SECOND round...directly back at the shooter.".
That did not occur in the video, nor did I see a likelihood of it occurring.