No real way to answer, since there are a number of pistols that fire rifle caliber ammunition. There has even been a bolt action pistol mde in caliber .50 BMG, and a revolver in .600 Nitro Express (an elephant rifle cartridge). In the traditional revolver type, among the MORE powerful may be the .500 S&W, the .460, and some of the Linebaugh and Cassul cartridges. There is a point reached where a cartridge may be possible, but have no practical use. If a handgun has so much recoil that it cannot be fired, or weighs more than a rifle- what's the point?
The most powerful air pistol would be a Air Force Talon-p 25 Caliber. This is a PCP class air pistol. The air tank uses 3000 PSI to fire the pistol.
A powerful pistol will have a powerful recoil.
Smith and Wesson 500 magnum revolver
The pistol in the movie Dirty Harry was a .44 mag - "the most powerful handgun in the world" according to "dirty" Harry Callahan.
First, it is rifle, not riffle. Second, no, or we would shoot tanks with a rifle. Cannon are more powerful. Finally, depends on the rifle. I have a .22 rifle and a .44 magnum pistol. The pistol is far more powerful than the rifle. I also have a .22 pistol, and a 30-06 rifle. The rifle is far more powerful than the pistol (in THAT example).
No way to answer- would depend on the pistol.
Most likely it would be the Evanix Hunting Master AR6 by Evanix. It fires a 22 caliber pellet at 1000 FPS. This pistol is in a class of PCP pistols. (Pre Charged Pneumatics.)
No specific term of reference. There are semi auto pistols that fire rifle cartridges, and are much more powerful than standard pistols.
It is the same power as any other firearm that is firing the same caliber cartridge. Contrary to myth, this is NOT the most powerful handgun in the world- not even close.
Beretta Elite 2 has more power
Considering PISTOLS ONLY, NOT rifles then: The Beeman P-1 is amongst one of the most powerful. But there are most likely others. But that is only in .177 caliber. Real power is in the PCP (PreCharged Pneumatic) air guns like the .25 Cal TalonP or the .22 caliber Marauder pistol. see the link below
It was a Smith and Wesson 44 Magnum "The most powerful handgun in the world" according to Harry.