Hey DUmmie lurkers take some numbers back to TMN, because he's an idiot. Here's the comparsion between the 5.56 & 50 BMG.
5.56- 63 grain bullet- Vel. 2,970 Energy 1,238 Ft lbs
50 BMG- 750 grain bullet- Vel- 2820 Energy 13,241 Ft lbs. At 2500 yards the 50 BMG still has almost twice the energy the 5.56 has at the muzzle. The longest confirmed sniper kill was taken by a 50 BMG at about 1.5 MILES.
You DUmmies claim to be SOOOOOOO much smarter than everyone else and then they come up with this crap that a simple Google search would take care of.