Not to nit-pic (well, not much) but:
Originally Posted by Ghuqu2
Remington Premier Match Ammunition 308 Winchester 168 Grain Sierra MatchKing Hollow PointThat puts the 308 at about 112% more energy than a 223 at the muzzle. The difference becomes more dramatic as range increases as the lighter 223 will shed energy faster than the heavier 308. At 100 yds., the difference is 153% (2303 ft. lbs. for the 308 to 910 ft. lbs. for the 223).
Muzzle Velocity: 2680 fps
Muzzle Energy: 2678 ft. lbs.
Remington Premier Match Ammunition 223 Remington 62 Grain Jacketed Hollow Point
Muzzle Velocity: 3025 fps
Muzzle Energy: 1260 ft. lbs.