Here is an interesting article on the armies new ammo, True Velocity ships composite case ammo, 625,000 rounds
www.americanrifleman.org

An Official Journal Of The NRA | True Velocity Ships Composite-Cased Ammo to U.S. Army
True Velocity delivered more than 625,000 rounds of composite-cased 6.8 mm ammunition for evaluation by the U.S. Army.