I've been reading online for a while and have reached the point where I'm just confused. I want to zero my 4X ACOG for my 14.5" Colt SOCOM rifle. I do not have access to a 100 meter range target, only 100 yards (fixed target stands). I want to 100 meter my ACOG so I get the best possible performance out of it. I am assuming it is calibrated for the 62gr M855 round, correct? So that's one thing. I should zero it with that ammo, but am unclear what results I'll get if I use 55gr or 77gr bullets. I should zero it at 100 meters, but again, I do not have access to a 100 meter distance. I can probably get a good 25 meter target set up, but then I'm not at 100 meter.
Your advice would be appreciated.
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