David spargenator said:
What about like real rifle rounds. Like 223, 243. In a concealable pistol design. Like a glock. I think if a manufacturer made something like that they'd sell a lot.
How in the world are you going to fit a magazine of .223 or .243 rounds into a concealable pistol design? Grab an AR-15 magazine: That would have to fit inside the grip of a handgun chambered in .223. Nobody with regular human-sized hands would be able to hold this handgun with anything resembling a normal handgun grip. And the grip for a .243 would be even bigger; about the size of an AR-10 magazine.
Also, rifle rounds have much higher chamber pressures than handguns. A .223 makes as much as 55,000 PSI and a .243 makes as much as 60,000 PSI; compare that to a 9mm's 35,000 PSI. This means you're going to need the handgun to be bigger and heavier in order to handle the higher pressure; it would almost certainly have to be gas-operated like the Desert Eagle.
So now we have a handgun that's heavier and larger than a normal handgun, and has a grip that's too large for anyone to hold. And for what? With the short barrel our rifle rounds have lost a HUGE amount of velocity and are ridiculously loud. Rifles are designed to shoot a small-caliber bullet at very high velocities out of a long barrel. But when you shorten the barrel too much you lose a large percentage of the velocity that makes rifle rounds so effective out of a normal barrel.
Rifle rounds are too long and too powerful to fit in a concealable pistol design. And with the short barrel you'd loose too much of the velocity advantage anyway. There's a reason pistol rounds are designed the way they are.