Think you are going to 'run out of barrel' with those heavier bullets at longer distances. Just can't get enough MV in 16". Most of us are shooting at least 28" at 600yd and 30" & 32" are becoming more popular all the time. 20" without a flash hider/muzzle break will be as good as it gets for a .308 in Tactical AR. Should be a terrific tack-driver.
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Glenn...
Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag
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