However, if we use the Taylor factor for comparing calibers, it kind of evens out the playing field.
Weight in grains x velocity in FPS x diameter in 1000's of an inch /7000=TKF
Oh, PAAAALEASE!!!! Chuck Taylor's drivel is right up there with UFO research.
It's a very weak attempt by a mathematically challenged gun writer to attempt to make the .45 auto look ballistically superior with made up arithmetic, can hardly class it as algebra.
It is simply a momentum thing, which is great at explaining how a bowling pin falls, not much else.
For the most part I'm thinking they don't catch on more due to the widespread popularity of the .357 magnum. Folks that already own a .357 may be reluctant to spend money on a semi-auto that performs in almost exactly the same niche. Folks that like to hunt, but considered the .357 underpowered for their needs, seem to jump to the .44 magnum and beyond and bypass the 10mm and .41 magnums. The 10mm may (continue to) grow steadily as younger shooters looking to fill that niche for the first time opt for the semi-auto platform.
In my own case, being a hunter, I see very little difference in the 720 ft lbs I can get out of a 10mm with 5" barrel and the 785 ft lbs I get out of my 6.5" Blackhawk. And, for hunting, autos are at the bottom of the stack for platforms. First of all, they lack accuracy. The Desert Eagle has been claimed to get 4=-6 moa out off a good load in articles I've seen, but no service sized auto I've ever fired, especially a 1911, can do that. Then, there's the problem of mounting a scope. Most serious handgun hunters want a scope out at the outer limits of range, 100 yards for guns like the .44 magnum in a good, accurate revolver. Revolvers are more accurate, have better triggers, are safer to carry afield, can easily be mounted with a scope (especially the various hunter models like the super redhawk). While I have taken a deer with a Ruger 6.5" Blackhawk with irons, my favorite hunting handgun is a Contender with .30-30 12" hunter barrel and 2x scope. There is no place for "firepower" in a hunting stand. One shot is enough. Why would I NEED an autoloader afield????? That one well placed shot is what it takes. It don't matter how fast you can fire it. If you miss that deer with the first shot, all you're going to see is a white flag and that's going to be well over 100 yards before you can trigger a second, trust me!
I sense there are few deer hunters among us here.
Autoloaders are great for self defense, but they are out of their element in the hunting stand regardless of chambering. I think that is why the 10 hasn't caught on as an outdoor round, the platform, not the round. The .41 mag is vastly superior, too. You can get energies well up over 1000 ft lbs with a 6.5" .41, rivals a .44. You ain't gonna buy 'em at walmart, will take an evening at the reloading bench, but that's what hunters do, serious hunters that wish to optimize their equipment. I don't look upon a cartridge for what I can buy from the factory, but for its potential as a reload. The .41 magnum shines when viewed this way. My .45 colt pushes a 300 grain bullet nearly 1200 fps out of a 7" barrel. That's my favorite revolver round. I wouldn't really care for .45 colt if I were limited to factory loads, especially considering the price of the stuff.
The 10mm is limited by the fact that it is chambered in an autoloader. You just can't push it as hot as if it were in a strong single action. Again, autos are not for the outdoors. They have serious limitations in such use, both in accuracy and potential power. I can understand using one as a defensive weapon in black bear country, but not as a hunting gun. A shot at a charging bear is going to be quick and you might get to trigger off a couple of quick, accurate shots if you're lucky. It's going to be at short enough range such that the limited accuracy of the auto won't be that much a factor. Still, give me my Blackhawk.
I don't have anything against the 10mm, just trying to explain my point of view as an outdoorsman since I don't think many of the 10mm guys here have actually hunted by the sounds of it.