I just picked up my Zastava Pap M70 AK yesterday.. I haven't fired it yet but I dry fired and racked some rounds through it... It looks like the feeding ramp isn't low enough to clear the bullet.. I used metal mags and a cheap Tapco same results failure to feed.. Should I attempt to dremmel the ramp myself or deal with sending it back to Century Arms?
Also be sure that when you rack the rounds in that you pull the charging handle to the rear and let go. Do not ride the charging handle forward. If you try to " baby" the rounds in to the chamber you can have the type of problems you experienced.
Also, that looks like a kind of cheap aftermarket mag which could contribute to your problem.
The mags were some metal surplus mags from the gun show.. No stamping on them so I don't know where they're from.. I heard the Yugo mags fit the best and circle 10 are good also.. One good thing is there is no mag wobble but the mags fit in there a little tighter then I like you have to kinda work them in.