I currently have 3 Kimbers: Ultra Carry, Target and TLE II. They are all great pistols. T
he UC is about 4 years old and has just over 5,000 rounds in it. The Target was the first Kimber has it has over 11,000 in past 6 or 7 years. The most recent purchase is the TLE II and it has just over 3,000 rounds in it in past 2 months.
The UC needed some tweeking to get it to work 100% but the Target and TLE were 100% right out of the box.
I found the Wilson mags to be most reliable in the UC but my Target didn't like the 7 or 8 round Wilson mags. I would get about 1 FTF out of every 50 rounds of my SWC reloads. With the 8 round CMC Shooting Star the Target is 100% reliable. I tried the 8 round CMC Power in the TLE II in the beginning and they worked 100% so I just stuck with them.
One of my friend has a series I classic and it refuses to feed SWC reloads in Wilson 8 rounders but both Power Mags and Shooting Stars worked great.
I have some SA and Colt 1911 pistols that work 100% only with the Wilson mags.