Doesn't sound like an Ammo problem. Sounds like a mag issue. This is exactly what mine would do. fire off 2-3 rounds and then jam. I would pull the mag and it was like a salt shaker exept with 7.62 rounds instead of salt. > Pull them apart and look at the welds on the inside. Most of my worst ones had large rough spots or burs that were catching on the follower. I sent them back (twice) and all work well now. I do have one that I fixed on my own by sanding the inside of the mag where the rough spots were. After that and a little sanding/buffing of the follower it now runs 100%.