How does one find what ammo is allowed for concealed carry in each state one will be travelling through? Is there that much difference between states on this matter?
Just some beginning thoughts.
SS190 isn't AP... it just recieves hype because it can penetrate soft vests and kevlar helmets. Real armor just laughs at it.
SS109 (5.56x45 NATO) does have a hardened tungsten core, it will make it through some steel plate.
I'd much prefer something more formidable like the Glaser Safety Slug.