In the 416 cal there are a lot of bullets with low opening velocitys in the 1000-1200fps range, mostly big round nosed dangerous game stuff. So for a sub gun, its a smart caliber, but I doubt it will be viable at 200yds even with supersonic loads and pointy bullets.Looks like magic unicorn fart bullets to me. A point blank range of 200 yards on a man size target? I wonder what the case capacity, muzzle velocity, and drop past 100 yards are? "Rapid yaw on impact, producing massive tissue damage and knock down power"? Last I checked yawing does not transfer energy at an optimum rate when compared to bullet expansion. Sounds like a lot of compromises going on.