Bullet stuck backwards!

[Criticalt]

Hey Glenn, maybe I can help. This is the sequence that happens as you fire your gun. At the gun fires the bullet travels down the barrel, the gases that are created propels the slide backwards (blowback) and the extractor ( a hook of sorts) grabs the brass, pulling it out of the chamber and pivots it out of the slide (and gun) as it comes all the way back. The slide then goes forward, pushing a new cartridge back into the chamber. Now you probably already know this.

What happens when you have a smaller caliber cartridge in the gun (40 in a 45, 9 in a 40, etc.) is that during the blowback part is that the extractor can "pass over " the lip of the smaller sized brass instead of catching it. Because the difference in diameter of the case sized (tenths or hundredth of an inch) it doesn't take much for this to happen. Therefore the smaller brass doesn't get extracted out of the chamber and when the slide travels forward, the next cartridge pushes it down the barrel. The gun then is able to fire and the bullet encounters the spent brass . . . Kaboom!
It's all about the extractor not making proper contact, not the gases propelling the brass out.

Your picture of a stove pipe is correct. I don't know what the term is (nor do I think that there actually is a term) for the event that Criticalt had happen to his friend. Although FUBAR comes to mind. I hope that this helps.

Thanks for explaining that, it makes sense.
The case was just about that far jammed into the barrel.
Im really surprised the barrel wasnt destroyed.
The casing was really stuck.