Yes does look like the 400gr is a reload. Not withstanding that the 10.75x68 loaded with a 400gr bullet crimped in place would still be close to the original .404 specs and there is nothing wrong with that. Provided of course the magazine was long enough and the throat was not too short. Then again with good 347gr Woodleighs there will be no flies on the cartridge loaded to 2200 - 2300 fps MV.