I have a S&W 1911 Gunsite addition. It has been by far one of the most reliable 1911's I've ever owned. While shooting yesterday it choked on me twice. The first time was with a Wilson mag and Winchester 230gr. ball ammo. It was a strange hang up. The gun fired the round them upon trying to eject the round the slide locked up. The round was not in a full stovepipe but close. The round was bent sideways with the front of the non ejected case hitting the right upper part of the top of the slide. The ejector had let go but it seemed to be hung up back towards the extractor. The next round was Winchester Ranger fired from onw of the ACT magazines that came with the gun. This gun has over 1700 trouble free rounds through it. ANy ideas what might be going on?