Why do I have to wind my hi cap magazine for airsoft every time I shoot a bb?

Pacman

New member
I got a new airsoft gun and when I went to use it it wouldn't fire. I thought it was because I didn't wind the magazine. When I did wind it I had to wind it every single time I shot a BB.. Why?? Isn't it supposed to shoot like 150 before I have to wind it again?
 
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