Ok I got talking to a guy about the M16's, about why is the military still using the 5.56. After a bit of number crunching I found that the 5.56 pretty much sucks past 500 yards. At 500 yards with a 5.56 using a 55gr bullet it hits with about 350 ft-ib. Where a 30-30 theoretically hits with around 400 ft-ibs using a 170gr bullet. I know the diameter and the weight of the bullets are different but it's just a comparison. Now the military says the M16 is effective for a point target out to 550 meters and an area target out to 800 meters? I can see the 500 meter mark possible but what the 800 meter is just to give people the impression that someone is shooting at them? Why are we using the 5.56 when the 30-30 or even a 270 win has more power and about the same recoil?