I just bought a new M&M 10 AK-47. I have ran 3 banana magazines through it flawlessly and it seems to manually cycle banana magazines flawlessly as well. However, I also bought two drum magazines. One of them being used and the other new. I had to file these magazines to fit the gun but I didn't go crazy with the filing so they are a good snug fit. But here's the problem. When I shoot the rifle it will cycle about 20 or 30 rounds and then the bullet will jam. It's not on the feed ramp leading to the barrel I don't know what it is called where it's jamming but I have provided photos. I will have anywhere between 3-5 jams per drum. The first time it jammed I wound the drum 7 times. (Since I read online people winding their mags anywhere between 2-7 times) This was the used drum magazine and it was a pain to get off the gun. I had to actually take a hammer and lightly tap the mag release lever to get the drum off so I think I have to file this old magazine down a little bit more. So I thought maybe there was too much spring tension so I wound the next magazine 3 times. This was the new magazine and it still did the same failure to feed effect that the old magazine did. Any suggestions? I really appreciate your help! I have tried looking online for a solution but I haven't found any yet. P.S. I have been using Tulammo both hollow and FMJ and it jams with both of those. Also, what exactly is this "Break in" period on guns? Does the gun need to be shot so many times until the parts wear down so that it begins to feed reliably? I apologize for some of my newbish questions this is my first rifle lol!