The Firing Line Forums - View Single Post - Comparison of the 6.8 SPC to the 7.62X39mm

jephthai · July 16, 2012, 06:12 PM

You'll never get the grendel and 6.8 people to live together. Such is life.

Anyway, I've been shooting my 6.8 SPCII in 600-yard F-class matches for a few months (I'm no good at it, but the round isn't the problem

). When you say "ballistically", right now I think of the curve. Run a few numbers, and you'll see that the 6.8 defeats the 7.62 fairly handily in the drop and energy department once you get far enough out. That 7.62x39 doesn't exactly have the best BCs.

Not like you're going to take a deer at 600 yards with 450 ft-lbs, but hey. It is a ballistic differentiator

.

I'm not running anything particularly hot, but my load gives me a max PBR (according to JBM) of 309 yards. For something that gives me more warm fuzzies (terminal-ballistically) than the 223, I feel pretty good about that.

July 16, 2012, 06:12 PM	#23
jephthai Senior Member Join Date: July 5, 2007 Posts: 463	You'll never get the grendel and 6.8 people to live together. Such is life. Anyway, I've been shooting my 6.8 SPCII in 600-yard F-class matches for a few months (I'm no good at it, but the round isn't the problem ). When you say "ballistically", right now I think of the curve. Run a few numbers, and you'll see that the 6.8 defeats the 7.62 fairly handily in the drop and energy department once you get far enough out. That 7.62x39 doesn't exactly have the best BCs. Not like you're going to take a deer at 600 yards with 450 ft-lbs, but hey. It is a ballistic differentiator . I'm not running anything particularly hot, but my load gives me a max PBR (according to JBM) of 309 yards. For something that gives me more warm fuzzies (terminal-ballistically) than the 223, I feel pretty good about that.