I have had a Westley Richards double rifle for several years stashed in one of my gun safes. I bought it used from Westley Richards in the US as a 450-400 3". I shot it with the rounds appropriate to it--no problems. Now I have started thinking about taking it to Africa.

The questions start. The barrel markings are, "400/35/400 cartridge." Nowhere does 450/400 appear. The spent cartridges and a chamber cast confirm 450/400. The barrel flats have British proofs and," Cordite 55-400 Max." What do you make of this? I am concerned that if going through customs in some African country, a problem could occur with cartridges not matching gun. Africa would be in 2024 so no great rush. Multiple other guns available.