For those of us who shoot 44 Magnums and above, this is an amusing thread. A couple of comments -
Calling 10mm a "hand cannon" is really funny. You should try shooting a 44Mag, 45Colt with Ruger Only Loads, 454, 460 S&W, 480 Ruger, or 500 S&W. Those are hand cannons. 10mm is a nice, hot semi-auto load. It's not a hand cannon.
That picture is funny. 200 grains at 1275fps is easily achieved in a 357 with a 4 inch barrel. Buffalobore sells a 180 grain hardcast that was chrono'd at 1302 fps out of a 3 inch J frame and 1375 out of a 4 inch Mountain Gun. 200 grains at 1275 fps is not a big deal to people who shoot real "hand cannons".
As noted before, handgun cartridges are normally not filled all the way with powder. Not by a long shot.
This is somewhat true for fast burning pistol powders. It's not true for slow burning magnum powders like AA9, 2400 or H-110. I reload for my magnums (357, 44, 45 Redhawk) and I routinely stuff as much powder in there as is possible while still seating the bullet.
There are lots of examples of shooters running revolvers dry during animal attacks.
Please give us an example of this. I've never heard of one case where someone ran a revolver dry during a bear attack. Greg Brush stopped a 10 foot grizzly in Alaska with 2-3 shots from a 454 Ruger Alaskan. That's documented. Look it up. Other than that, there are very few documented cases which we can learn from. I've never heard of a single case where someone used a 10mm to stop a bear attack.
Shooting a bear off of you once it's on you is a real concern. The semiauto guys love to think that this is where their "hand cannon" will really shine. They conveniently ignore the fact that semiautos can go out of battery pretty easily when pressed against something. If a bear chomps down on my revolver barrel, I'm still going to pull the trigger and put up to 6 rounds through it's head. There was a case reported many years ago of a guy who carried a single action revolver (I think it was a Blackhawk) who shot a bear off him. He had trouble cocking the hammer for each shot but managed to do it and killed the bear. He was injured badly but survived. That was the only case I've read about someone "shooting a bear off them". Sorry, but I don't have a link to that anymore. Wish I did.
10mm is ok anywhere a 357 is ok. That covers most of the USA. But in Alaska, Montana, or anywhere the big bears live it's not enough.
And just because someone's second cousin Bubba carried a 10mm, 9mm, 45acp, 38special or whatever out West and didn't "feel undergunned" or didn't get eaten by a bear, doesn't really prove anything.
I realize that some people really love their Glocks and think that revolvers are antiques that belong in a museum. I'm not trying to convert anyone. Carry whatever you want. The most important thing is to make the first shot count.
But some of the stuff being written here is really, really funny.
And that picture is pretty funny too.