What an awesome 1911, just bought my 3rd box of 1000 rd primers and never had a failure to feed or fire yet. Correction, when I first bought it, I tried the blue bullets and they didn't work out for me. They left a residue in the chamber and it would prevent the slide from going all the way forward after about 75 rounds. Since then I changed to plated and its been nothing but joy ever since..I use the mecgar magazines and feed they 115,124 and the 147 heads perfectly. This isn't my first 1911 and the other more expensive ones were a lot more problemactic requiring gun smith work or certain magazines/bullet head shapes to make it work. Heck, I don't even bother to clean it maybe every 500 rounds? Have yet to take apart the lower end, don't see a need to. Couldnt be happier with this 1911 and suggest it anyone.