I guess I have just been lucky. I have three Kimber and three Colt 1911s, and have never had a problem with any of them. All of the Kimbers have internal extractors, two are Series I guns, and one is a Series II. Two of the Colts are Series 70s, and the other is a GI model from WWI. You can never have too many 45s. But Lloyd already knows that.