Explain searching for infinite ammo address?

I don't exactly know how to search for an ammo address. Can someone explain to me how to find it? And also tell me what value I have to look for?

i dont have a clue here, just guessing maybe you scan when your magazine is full then empty somethin like that lol

hi there
search:
unknown initial value.
then shoot
and then search decreased value.
and then shoot
and the search decreased value.
do that until u find 1 address.

Taht doesnt work anymore =/ You should not copy stuff while you dont know anything about it >__>