Quoted:
Quoted: If you don't have 6.8mm SPC mags from PRI... you won't have shit.
I will go ask Zak-Smith on barrel lengths for your lazy northern ass, though.
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Thanks REDNECK
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Roger That.
You have RR's data... kinda twilight zonish like different barrels can be.
I'd go 16" with RR's data.
Zak said, "The difference between a 16 and a 20 should be in the 120-140 fps difference, RANGE."
Using only Zak's input, I say:
Since I am low-speed/high-drag, I'll take the extra velocity along with the extra 4 inches of barrel. The 120-140fps represents a 60-70% approach to magnum rating. That's alot for no extra powder, less recoil, and a very little increase in weight. Ahh, how 'bout an ABS barrel, hmmm?
I have been humping both an AR-10A4 and AR-10(T) when deer hunting for the last 7 years. The first five with a herniated L5/S1 disk and the last two with a ruptured L5/S1 disk. A 20" AR-15 platform will be cake, coffee, and a fine cigar.
From my journey in the 6.8 realm of scoping out others' chrono data with their barrel lengths... I'm going with a 20" tube.