i can see potential in this cartridge and brass available at graf's. bolt face @ .470", so that's an easy button. here's the difficult part...........ar barrel, mags that work and gas system choice? the energy from a 16.5" is getting close to 2k (1,850-1,950 m.e.), but it sure would be a short range weapon as bullets will have a low bc. i'd give it a go out to 500. does anyone have or reload for this cartridge?