Maybe it was at the range when you arrived.
Or maybe it was damaged when ejecting.
Or maybe it was damaged while on the floor.
I've also seen them come out of a reloader that way.
After a session of range shooting I picked up the brass and returned home. Cleaned off and dried the brass and found one that looked like this. Do not remember any jams or other miss haps.
flanman
Maybe it was at the range when you arrived.
Or maybe it was damaged when ejecting.
Or maybe it was damaged while on the floor.
I've also seen them come out of a reloader that way.
Happiness is a hot Colt 1911 and a pile of expended brass!!!
Ejecting is possible. I was shooting factory load( so could have been a bad brass to start with) and the range is at the end of our yard so no other shooters brass around.
flanman
Often happens during reloading. edge of a bullet catches and bends the case inward while the bullet is being seated. Sometimes firing will iron it out. Often it will not and you get a case just like the one you found.
Detectives, and Cobras, and Agents
Oh My!
+1 to DFrame's answer
thanx folks good to know I am not the first to have this and it is not the pistol that did it.
flanman
Yes this happens from time to time when reloading; especially when using lead bullets, or not enough flare. The crimp irons it out and it may or may not chamber.
Ken
"I like Colts and will die that way"
I'm good for about 1 of those per 100 during reloading when doing 9mm, haven't done it yet on a 45.
1+ to reloading. Ive had it happen too.