I would like to believe the 5.7 x 28 is "all that", its just hard for me to understand, how a 40 grain vmax at 1700 fps is as effective as even the 9mm 124 grain at 1100fps.
The advantage to the 5.7X28 is that it is a pistol/subgun round that can penetrate soft armor. Good luck marketing that to civilians without an onslaught of media coverage demanding it be banned.
Another advantage is the higher BC bullets along with speed making it a flat shooter to the 100 and 150yd line. But considering the fact that most people can barely hit the A Zone at 25yds, it kinda makes that advantage moot.
The round really can't be reloaded to potential, and that means you have to buy factory. And it ain't cheap.
You also have to build a gun around the cartridge. This has made it a one trick pony until Ruger stepped into the ring. Who knows where things will go from here.
This is to say that the 5.7 isn't a bad cartridge by any means. Just not as marketable for Joe Schit "need a house gun."
