I have mine for 2 weeks, have fired over 800 rounds. Everything works perfectly except Federal Bulk. Lots of failure to feed and failure to eject. I have cleaned it several times, tried lots of lube, sparsely lubed, nothing helps. I called S & W yesterday and was told that I basically have to live with it. He told me to use CCI (which has been flawless). One of the main reasons that I bought this 22 is because it is cheap to use. CCI costs me more than double the price of Federal. Not a complete deal killer but I am disappointed because there are many posts all over the internet about owners of this gun who have absolutely no problems with any ammo. The S & W tech support guy told me, "Well, every gun is different." Otherwise, I love the gun but I chose this gun over, for example, the Sig Mosquito because this gun supposedly could shoot anything. Not so in my case.