Ok, I just purchased my first firearm, the full 9. Whenever you put in a loaded mag do you always have to cock it back or is there some button i can push where it loads the bullet in the chamber itself? I saw some lady do this with a Glock, and i was like wow that would be easier on the fingers. I know this is a stupid question but i am very new to this, only been to the range like three times. thanks! 8)