[mad_as_he$$]

Really?
7.62x39
Muzzle Velocity: 2355 fps
Muzzle Energy: 1515 ft/lbs
100 Yard Velocity: 2026 fps
100 Yard Energy: 1121 ft/lbs
200 Yard Velocity: 1726 fps
200 Yard Energy: 814 ft/lbs
300 Yard Velocity: 1463 fps
300 Yard Energy: 584 ft/lbs

223 NOT 5.56mmx45
Muzzle velocity: 3240 fps.
Velocity at 100 yards: 2874 fps.
Velocity at 300 yards: 2222 fps.
Muzzle energy: 1282 ft/lbs.
Energy at 100 yards: 1008 ft/lbs.
Energy at 300 yards: 603 ft/lbs

So your blanket statements are false. Even 223 has more energy and velocity than 7.62x39 at 300 yards.

[RC one]

whose talking about 7.62 x 39? I have been talking about 7.62 NATO which has around 2,500 ft/lbs of muzzle energy and is used regularly to kill soldiers at 1000+ yards. Furthermore, a typical rifleman is limited to 300 yard targets with his M16A2. If he has an M4, the bullet has lost most of its lethality at this range-never mind beyond that. Not so with 7.62 NATO.