Didn't have a zero for 1200 yards but had a foundation zero so using the JBM Ballistics Program.....got on the mainframe with a shot and made a correction and fired these five shots. Group measured 6" vertical x 7.25" horizontal. This was shooting the 123 gr. Sierra Match King with 38 grs. Varget, BR4 Primer, Lapua cases w/COAL=2.749". Now that I've got a clue as to the zero....I'll sock my next 5 or 10 into the 10 ring plate. Bull overall diameter is 44" with the inner 10 ring plate being 20". I don't believe over a 60 year span of shooting that I've ever fired a rifle as accurate as this one! Built on a Rem 700 action with McMillan stock and topped off with a NightForce scope. One helluva accurate rifle and cartridge!!