Controlled feed is only really important on a dangerous game rifle, it stops jams if you short-stroke the bolt when the adrenalin is pumping and it will kick out the cartridge already picked up. A push feed will leave the first cartridge in the chamber and then pick up another and jam up, not fun when a Cape Buffalo is pissed off! It also has a larger contact area on the case rim so extraction is more positive if you have a stuck case. Nothing wrong with a push feed for varminting etc.
It is desirable as it is a more expensive feature and is one of the main selling points of the Mauser k98 action, so when they advertise the Zastava as a "mini mauser" immediately you think of controlled feed which it is not!
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