actually the americans developed the ‘6.8x64’ in 1923 ... but for some reason - despite the fact that something better has been sitting under their noses for 94 years - north americans still get excited over a little Swedish ####.one day, the swedes immagined a cartridge which gets the best possible ballance between performance, accuracy and barrel life. then yankees have tried to get something bettet because of course there is no way they would admit someone else makes something good enough for them. Well, this was about 125 years ago and they are still trying