Depends on the application. If you mean power, the higher the caliber, the more powerful it is. for example, a .22 caliber rifle is much less powerful than a .50 caliber rifle.
A firearm is more powerful.Most firearms are more powerful than most BB guns, but there are some exceptions. There are some pro series BB/pellet rifles that are actually more powerful than some small caliber firearms.
Russian .60 caliber. There is also a Chinese version. More powerful than the US .50 Browning, it is a true Heavy machine gun.
A BB gun would be more powerful
Power is not determined by the make of the gun, but by the caliber of the cartridge that it fires. The Desert Eagle was made in several calibers. There are revolvers that fire less powerful cartridges, and revolvers that fire more powerful cartridges.
Fifty caliber, but it is more of a toy than a paintball gun.
It depends on your definition of "powerful" however, 10mm ammo tends to have more muzzle energy than .357 magnum ammo. Every chart I've seen rates 10mm muzzle energy above 700 ft lbs and .357 magnum muzzle enegry below 600. Even though the velocity of some .357 rounds was higher than some 10mm rounds, the muzzle energy was higher for the 10mm in every chart that I've seen. So I think the answer to your question is yes, however, in an effort to try to be as accurate as possible, it depends on the load. It is possible to download a 10mm to a lower pressure or to load a .357 to a higher pressure.
The 17 pound gun was more powerful than the 90mm gun.
A 50 caliber gun, or more properly, a .50 caliber gun is a firearm having an internal bore diameter of 1/2 or .50 of an inch.
No, not really. A .32 S&W Long caliber gun is not considered powerful by today's standards.
the 12 guage is a caliber not a gun
M2 can be hand held, but, that is the exception. MP5 in 10mm is along the lines of what you might be asking about.