Some of the fastest- the Ruger .204, the .220 Swift, and the 30-06- but only if the 30-06 is shooting the Remington Accelerator. That is a sabot cartridge that fires a small .25 caliber bullet at roughly 4,500 fps.
you will have to define if you mean commercial or wildcat.
Depends on the load
The L1A1 SLR used by the British military is in caliber 7.62 NATO, and has a muzzle velocity of about 2800 fps.
800-1000 fps
The .45 caliber bullet is not used in a sniper rifle.
According to Hodgdon, it varies from about 2850 fps to about 3600 fps.
The .223 Remington rifle cartridge has a muzzle velocity of approximately 3600 feet per second.
It can vary from 900-1300 FPS depending on the weight and the firearm. Generally a smaller slug can have a greater velocity and a greater energy.
Between 830 and 1300 feet per second, depending on the load and the barrel length.
muzzle velocity is the velocity of bullet and recoil velocity is the velocity of gun.
Can't be answered without knowing the projectile weight and muzzle velocity
No one answer. There are dozens of different .44 caliber cartridges, and hundreds of different loadings of those cartridges. A rifle will have a different velocity than a handgun. This is sort of like "how fast can a V8 car go?"