It’s not too far fetched with reality.
I used to sell wood pulp to a company that made tank/artillery/mortar casings from a nitro-cellulose infused paper “tube”.
It became part of the charge and was spent when the round went off. No waste nor hot brass to deal with inside the tank.
Paper-cased bomb!
Of course Harrison Ford had to look it up in a binder, while the Cuban agent had a computer at his fingertips.