Mine has been flawless with everything I have fed it. In the video below I loaded all the mags randomly with CCI, Remington, and Federal (both lead and plated & hollow point and round nose). This dang thing is way too much fun. I lost count of the rounds fired and it never jammed once.I also have the GSG 1911-22 and it has been flawless so far. Ammo-wise, I have only shot CCI MiniMags and CCI Tactical and I'm tickled pink with the results!
jhp ... The Sig 1911-22 is made for Sig by GSG (German Sport Guns). With the exception of the grips, the fact that it says Sig on the slide, and the fact that Sig covers the warranty instead of ATI, it's identical to the GSG 1911-22 (which was the original version). I have a GSG 1911-22 with over 30,000 rounds down the pipe. You can see my thoughts at the following link if you're interested: