My experience with numerous 3" and 3.5" 1911's have been 100% reliable. Kimber and Colt. Full disclosure, I did return a Kimber Custom II 3" one time because the thumb safety scored the frame. Only issue I have ever had.Use to custom gunsmith's wouldn't touch a 1911 under the Commander length because they couldn't make them reliable, I think Clark Custom is still that way. I don't know if they have something figured out nowdays that makes them better or not. I want one of the CCO versions, thats a Commander slide on an officer's frame I think that would be perfect.