That event has been determined classified, top secret and any and all information has been deleted, scrubbed from any data sources.
Dillon has Govt contracts, they have excellent "damage control" methods
There is no knowledge of such a thing ever happening, All witnesses have disappeared.
The compound leverage block broke on my Dillon 550B. I forget when, but I bought the thing in the middle 1980's and I have no idea how many hundreds of thousands of rounds that thing has made. My Dillon 550B press has an aluminum frame and leverage block, given enough load cycles, aluminum will always fatigue fracture. Dillion asked for my press back and they fixed it for free. Dillon has a great "NO BS" warranty: I am a happy customer. I am sure RCBS will do the same for the OP.