Some years ago, I was at the range with a used Springfield 1911 that I had just bought. One shot felt very different.
The front half of the slide had cracked off - clean, like it had been cut by a knife - and gone down range.
Called SA and sent them the gun. They had had a problem with heat treatment on a run of slides. They returned the gun to me quickly and it has been perfect since through many, many rounds.
"Only hunting and mountain climbing are sports. The rest are just games." - R.Ruark
NRA Life Member