The L1A1 SLR used by the British military is in caliber 7.62 NATO, and has a muzzle velocity of about 2800 fps.
muzzle velocity
Muzzle velocity of the SS-109 cartridge is about 3100 feet per second.
The M4A1 version of the M16 rifle has a muzzle velocity of about 2900 feet per second, firing the 5.56mm cartridge.
Varies with barrel and cartridge, but the muzzle velocity is about 2600 feet per second.
you will have to define if you mean commercial or wildcat.
About 3,396 ft/s
Depends on the load. 1000-2500 FPS
It will depend on the ammunition used. @ 850 mps
The .223 Remington rifle cartridge has a muzzle velocity of approximately 3600 feet per second.
The M4 carbine has a muzzle velocity of 2,970fps(884m/s).
It can vary from a few hundered fps to over a thousand fps