bought an AK formy mother right before i left home. While shooting it rounds would fail to load the bolt wouldent catch on it to drag it into the chamber. when using the magazine as grip and applying force pulling it back the rounds would load fine but once in a while the bolt would lock to the rear even with more rounds left in mag. Is this just a bad mag or possibly something else. sorry if i dont respond timely i deployed today and we happened to stop in Ireland to refuel so figured id ask thanx for any help!