On the forum we have to use english ! On private basis we can speak french together! OK! In a first time slug the barrels : caliber must be .458 inch.! In a second time check the chambers : straight and 3.25 inch. long! Use only 350gr.SP bullets cal.458 special for nitro loads for BPE from Woodleigh! Today there are not loading data fot this purpose, but originaly this cartridge was loaded with 55gr. of Cordite. I think 50gr. TU3000 is a safe starting load, and you need a filler, better a wad like in a shotgun cartridge! But ATTENTION!!! YOU MUST BE A EXPERIMENTED RELOADER AND YOU DO THAT UNDER YOUR RESPONSABILITY! WE DON'T HAVE PRESSURE BARRELS, THE PRESSURE INCREASE RAPIDILY IN THIS CARTRIDGES!!! Blackpowder reloads are not a problem.

The .475 caliber is a hash out of standartisation! Ammunition is a big problem! Better you buy a 470NE or a 500NE!