text: Bound's hubby here:\n\nAs you are aware the front post on the M14 is fixed. The left knob on the rear sight is your elevation and the right knob is your windage. \n\nOn the rear sight base, center the windage index marks with the receiver base. With your elevation knob, run the rear sight all the way down (twist the knob forward). Do not pay attention to the elevation calibrations on the elevation knob, 110% of the time they do not match. Now, raise the rear sight four clicks. The rule of thumb with the M14/M1A is that 4-6 clicks of elevation will put you on paper at 200 yards. \n\nThe elevation drum with the calibrations is typically calibrated for use with military M118 ammo (173 gr. FMJBT-full metal jacket boat tail). \n\nYour rifle will shoot best using either 150 gr. FMJ, 168 gr. HPBT, 173 gr. FMJBT, or 175 gr. HPBT bullets. You can adjust the index wheel, but what alot of shooters do is mark their zero with nail polish, it's alot easier. \n\nZeroing a rifle with the 25m target (1000 inch target) is generally reserved for use with the M16/AR15 because of the raised sight line.\n\nGood luck.