My cousin is borrowing my 9mm tool head and was loading last night and did this to the sizing die:

No idea how that happens. I've only loaded a few thousand rounds of 9mm with those dies, and I always lube my cases despite having carbide dies. That's the carbide ring stuck on the case.
He already called Dillon and they're sending a new one. They want the old die back to see what happened. I asked him for more pics from different angles and of the rest of the die, which he'll get after work, or sometime this weekend.
Good news is he got enough loaded before the failure for the IPSC match this weekend!