Originally Posted by
BobinNC
Sierra .224 77 Gr Match King G1 BC .362
In 5.56mm
Started @ 2650 FPS (16" barrel) with a 50 yd zero
@200 Yds -1.1" low (0.2 Mils) 833 Ft lbs of energy
@300 Yds -10.6" low (1.0 Mils) 686 FT lbs of energy
Barnes .308 120 Grain TAC-TX BT G1 BC .358
In a 16" 300 Blackout
Started @ 2200 FPS with a 30 yard Zero (to optimize drops for the slower projectile)
@200 Yds -0.3" Low (0.0 Mils) 902 Ft lbs of energy
@300 Yds -14.8" Low (1.4 Mils) 717 Ft lbs of energy
I don't know what your looking at but the 300 Blackout appears to be superior to the 5.56mm at all ranges under 300 yds.
For engagements over 300 yds you better have a good scope on the superior 5.56mm and know how to use it at range, because you going to need it.
It seems to me that the 5.56mm is sort of a niche option, and compares to the 7.62x35mm, not in a good way. But for engagements over 300 yds it is better, but only with a properly scoped rifle.
IMHO and YMMV.....