Went to the range with my brother and his ruger 1911 my kimber custom 2. Went through a 17 round ipsc style course 12 times each. I did not have a single malfunction. My brothers ruger had one if not two malfunctions per course except one. Malfunctions range from fte, stove pipe, to light primer strikes. Anyone had these problems? He was using factory mags, but later switched to my 47d. Had less problems but still had some.