720 rounds a minute approximately
450 - 650
Depends on what model you are talking about, 8-15 rds.
Anywhere from 400 to 1200 rounds per minute. Some Gatling guns can fire 6000 a minute, although they may not be considered TRUE machine guns.
about 500 rounds(bullets) per minute
No! Machine-guns are long range weapons, they can fire up to more than 1,300 meters away! But the thing is that machine-guns can fire more than 3,000 bullets per minute.
600
As fast as they could in World War II or Korea, though some could fire faster than others. The Browning was medium fast, the Lewis and the Vickers a bit faster, though the Germans had the fastest firing machine guns of all. I don't remember the specific RPM for each gun.
Fire a lot of bullets very quickly.
No. Machine guns are fully automatic. With Gatling guns, you have put in bullets and crank at the same time but with machine guns, you have to put in bullets, place them on the ground and let them activate and they will open fire. Gatling guns cannot fire automatically, you have carry them and hold them so they can fire. Machine guns are much better than Gatling guns because they can fire thousand of rounds per minute, faster, powerful and can automatically open fire.
You're probably thinking of the M134 'Minigun', which is capable of firing at a rate of 6000 rounds per minute.
The theoretical rate of fire was 400 to 600 rounds per minute. This rate though was rarely achieved and could never be sustained because overheating was a major problem.
The machine guns were the most affective defensive weapons in world war one because they could fire 500 bullets in a minute. There for the enemy couldn't attack because they would be mowed down by the machine gun fire.