$7.20 a box if you buy 5 boxes or more.   I only have 25 boxes total.

( It's advertised on cheaperthandirt dot com for $9.36 for a 20rnd box + shipping)

Prvi Partizan PPU Mil-Spec Ammunition PPN5562
5.56mm NATO  M855

The following information is from the MFG website.

62 Grain
Full Metal Jacket Boat Tail
Mil-Spec M855 Projectile
Muzzle Velocity 3050 fps
Velocity at 100 Yards 2785 fps
Velocity at 200 Yards 2535 fps
Velocity at 300 Yards 2300 fps
Muzzle Energy 1281 ft/lbs
Energy at 100 Yards 1068 ft/lbs
Energy at 200 Yards 886 ft/lbs
Energy at 300 Yards 728 ft/lbs