So I got a SIG GSR 1911 back in June of last year, and right from the start it was a jam-happy pistol. At first, it was FTF problems. I put 500 rounds through it, the problem remained, and so I sent it back to the factory. It comes back 2 weeks later and starts up with FTE problems. Sometimes the spent casing would just be sitting there on the top of the magazine on the last shot, sometimes it would wrap itself around the top of the slide and it would take a key to pry it out. Back it went.
Took it out after it was returned, and it did the same thing, but with less frequency. Called them this morning, and went through the whole gauntlet of possible problems. They asked about ammo, limp-wristing, modifications (none), and cleaning methods. It's got over 1,000 rounds through it now, so can't blame lack of break-in either. Finally convinced them by telling them I have another 1911, a Springfield, that has fed the same ammo with no malfunctions at all in my hands. Just got back from dropping the gun off for its third trip to the factory, and hoping for the best.