if they would simply switch to the 6.8spc cartridge we wouldnt be having the problems at 600-800 meters!
I for one can attest that shooting a target at 6-800 meters with a 5.56 is rediculous as the round cannot maintain the needed flight path to even be accurate. Any wind will blow that light of a round way off target. I personally went to the 6.8spc for the knock down power and boy am I glad! I can accurately hit a 6" manikin head at 700meters and I have video proof. I am sub MOA even at distances of 500 meters on a 16" barrel!!! For an AR that is fantastic! I am slowly building my 6.8 AR into an all purpose weapon and now that Barnes and a few other companies are making 85 & 95 grain bullets I can get even more accurate and a little more distance out of my AR. Currently, I am running 115 grain FMJ from Silver State Armory and they are good but I am looking for that extra edge! next toy has definitely got to be a reloading press...
back on topic the 5.56 bullet can hit a target and make good penetration at those distances but the problem lies in what happens when the bullet penetrates the body. What you will find out is that under 200M it takes the 5.56 round too long to expand and practically would leave a small hole all the way through the body with a large exit wound if i remember correctly. at around 200M you get ideal expansion within the body cavity with consistent fragmentation. Distances at 300M and beyond the round is traveling too slow and has 0 fragmentation once it enters the body often leaving the target alive and very pissed off!!! This has been in many reports coming from the field in Iraq and in Afghan.
On a side note I got several Shemagh's in the other day and I must say they work very well! for those who don't know what I am referring too here is a pic:
