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Posted: 4/20/2006 7:53:14 PM EDT
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Help a guy out please. I've looked and can't find the 50 yard point of aim for a 300 yard battle sight zero. I just got my CMP garand and am dying to shoot it, but all I have access to is a 50 yard range. I'll probably go out tomorrow afternoon. AFAIK, the rifle should be zeroed (POA = POI) at 300 yards. What does this equate to at 50? |
You don't need even the 50 yards. Just measure out 25 meters. Fire prone, with sling until POI=POA, and calibrate your rear sight's elevation drum so it indicares "2". Your rifle is now sighted in for 200 yds, and your rear sight calibrated. Verify at distance at first opportunity. An M1 BSZ is 275 yds, which is roughly 2 clicks up from "2". |
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Vanilla- what IS that? I'm not sure how to use it. raf- thank you very much. I actually have a trundle wheel calibrated in meters. By recalibrate the sight do you mean loosen the nut and reset the knob so that when zeroed at 25 m the knob reads "2" ? Thanks guys! |
In Duffs book he says zero the M1 with M2 ball (or equiv.) at 25 yards so that POI is 1.5 inches above POA. Then fine tune at 200 yards and calibrate the elevation knob at 2. AFIK, he's not a highpower competition shooter though. |
Given to me by one of the guys at my range that makes regular trips to Camp Perry. At 50 yards, use the crosshairs to set your 200, 300 and 600 yards and make your marks on your elevation knob. When you hit the 200 crosshair at 50, mark that on your elevation knob as 200 then same for 300 and 600. Or just 300 if that's what you want. I find it easier than trying to figure how high I should be at that range. |
That's right.
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Well, I am sorry to say that I let you down by omitting a step, but it should be no big deal to correct. In sighting-in an M1 or M1A, one should take advantage of the moveability of the front sight, and use that characteristic to obtain a mechanical zero for windage. To do this, start by making certain that you have the correct allen wrench for the screw holding your front sight in place. Once at the range, after clearing the rifle, set the rear sight to its mechanical center for windage. Use a sharp pencil to make an index mark on both the front sight and its non-moveable base. Adjust initial windage zero by moving the front sight in the opposite directaion to that which you want the bullet to go. In the case above, since the rear sight had been moved to the right to obtain zero, the front sight will have to be moved to the left. Be advised that it only takes a fairly small movement of the front sight to make a noticeable change. The advantage to performing this step is that you will understand your sights a bit better, will have more windage adjustment available in either direction should it be needed for long-range shots, and you now have the correct allen wrench for your front sight screw, the tightness of which should be checked more often than you might have thought. |
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