ShellShock Ammo. Bi-Metal cases.

[98Z5V]

NAS - Nickle Ally Steel cases.  5.56 at 100k psi.

75gr Hornady HPBTs running 3500 fps from a Mk12.   This is insane.

The things I could do with this case, reloading, and using the Barnes 70 TSX - just crazy...   

[Magwa]

and better yet the TTSX

[98Z5V]

Brother, I just want to see the 70 TSX running 100k psi through thee cases.  That's my jam, for 5.56 ammo, it's the one.  That thing might be running 3700 fps through these cases.  THAT is insane, for what that projectile can do.

That, by itself... revolutionizes small frame ARs...