A lot of the test ammo is powered by RAMSHOT powder - but the real Remington stuff uses a new proprietary propellent that delivers the goods. From the qualified reports I've read, the load shows terminal impact damage very close to the same as a 7.62, but much more compact and lightweight cartridges. BTW, there's been a load of arguments for years to adopt a .243 or similar cartridge for the M14 or similar platform and go with that. This new round beats the .243 and delivers performance very close to the .260 Remington.
For comparison, here's a 30 Rem - 6.8SPC - and a 5.56mm...
This new round also works at 10% less pressure than a 5.56mm NATO, and uses the same recoil spring & buffer from the M16/M4 platform. ALL THE RIFLES in current use need to be rebuilt - they're wore out. It's very cost effective and good for morale if the Military just installs NEW UPPERS with updated accessory rails & new magazines for the new round instead of just piddling around. ALL the tests that have been done in Afghanistan and IRAQ have given very positive results thus far! Just think of this new round from the M4 as a 9mm (weight) zippin' out there at 2700fps! GREAT for close range where many of the complaints have been noted. Long range, this is one deadly little bullet too!
GOOD LUCK! [img]images/icons/grin.gif[/img]