NuJudge
11-19-2009, 07:26 AM
"Bob S" posted measured rear sight heights and calculated the represented MOA change for movement between each rear sight setting for the 03A3. I thought it deserved to be posted here also because of the table's usefulness to cast bullet shooters. He did this also for the M1917 and Swiss 1911 Long Rifle. Most or all of these deserve to be a sticky, based on their usefulness to cast bullet shooters.
For the 03A3:
"One click on the windage screw is 1/4 turn of a 32 tpi thread. 1/128" = .0078". That's about 1 MOA at the sight radius of the 03A3.
Elevation table:
Change in Range MOA
200-250 1.5
250-300 1.7
300-350 1.9
350-400 2.1
400-450 2.1
450-500 2.1
500-550 2.4
550-600 2.6
600-650 2.8
650-700 3.0
700-750 3.3
750-800 3.8
Recognize that this sight is not a Redfield International. There is a significant amount of variance between individual sights, expecially in the elevation adjustments. Some of the detents on the ramp look like they were cut with a dull hacksaw, some look like they were lightly scribed with a scratch awl. Still, with some tightening, reasonably precise adjustements can be made. Pretty amazing considering the crude design and construction of the sight."
For the 03A3:
"One click on the windage screw is 1/4 turn of a 32 tpi thread. 1/128" = .0078". That's about 1 MOA at the sight radius of the 03A3.
Elevation table:
Change in Range MOA
200-250 1.5
250-300 1.7
300-350 1.9
350-400 2.1
400-450 2.1
450-500 2.1
500-550 2.4
550-600 2.6
600-650 2.8
650-700 3.0
700-750 3.3
750-800 3.8
Recognize that this sight is not a Redfield International. There is a significant amount of variance between individual sights, expecially in the elevation adjustments. Some of the detents on the ramp look like they were cut with a dull hacksaw, some look like they were lightly scribed with a scratch awl. Still, with some tightening, reasonably precise adjustements can be made. Pretty amazing considering the crude design and construction of the sight."