How many rounds (bullets) could the early machine gun fire per minute? how did this change by the end of the war?

Early machine guns, such as those in 1914, could fire 400-600 rounds per minute. After the war, the figure was more than doubled. The machine guns in could fire more than 1000 rounds per minute. The rounds were fed via a fabric belt or a metal strip. I hope this helps. 

Step-by-step explanation:

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