My 5 month old 229 9mm keeps jamming with a spent casing in the chamber. I sent it back to Sig, got it back last week. Went to the range and even though it's better I still had 4 fte. Do I send this gun back to sig or do I look for help else where. My first Sig experience is not what I was expecting at all. On top of that I'm currently looking for a .45. What to do what to do?