I have been doing some feeding tests on my new CZ 550 in 500 Jeffery... This is what I have found. Testing was using Nosler Safari Ammo (Nickel Plated / 570 Grain Solid) If I put three rounds in the magazine, the gun seems to feed fine most of the time... On occasion I have had the tip of the round raise too high, contacting above the chamber. This happens more when cycled slowly. Quick cycling seems to not give the nose to raise as high. The second issue seems to occur almost every time. When loading three rounds with an empty chamber. When cycling the bolt to chamber the first round, it will eject that top round from the magazine. The third issue which happened once, is with two in the magazine, one in the chamber. Upon cycling to eject the first round, the second round will also eject. My observations with this is that the spring seems to be weaker than what I have had previously with my old 416 Rigby. I am unsure if this can be the cause of the problem. I have also noted that on occasion when loading rounds into the magazine, one will occasionally “pop out”.... It seems to be that the spring is either not holding the round tightly enough to the top of the magazine, or it is opened up too much and not allowing a good seating position for that top round. I am aware that people have had issues with the nickel plated ammo, I have yet to try any of my standard brass case ammo. I did email the CZ custom shop to see what the issue may be. Any options or advice would be great. I am not a huge fan of sending stuff out if it is as simple as a spring issue. Thanks!