M1903A3 rear sight setting increments in MOA

[NuJudge]

"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."

[NickSS]

When I first started High power rifle shooting in matches in 1970 I used an issue 03A3 with M2 ball ammo. At least at the club I was shooting at I was competitive with most of the other shooters out to 600 yards. I did not have any stripper clips but still managed to get off 10 rounds in sitting and prone rapid fire stages loading loose ammo in the magazine. That old Springfield (Remington made with a 2 groove barrel) could shoot at least until I wore the barrel out.

[NuJudge]

I have about a thousand rounds of M2 Ball that dates from the beginning of WWII. It still shoots remarkably well. I believe M2 goes subsonic at about 500 yards, so I don't believe I would want to compete with it at 600 yards. The late M2 Ball such as LC69 I've shot has been remarkably uniform, all of it bad.

I've always been impressed with Springfield barrels, especially those made by High Standard, but also Springfield.

Up until I I recently got a Remington 1903A3 with an excellent original barrel, I had no experience with Remingtion Springfield barrels. I have not shot it much because of a weak spring that held elevation on the rear sight, causing every shot after the first to be out the bottom. I just replaced the spring and it seems to be holding zero. I'll know how well that barrel shoots soon.

[bkbville]

Good info!

Where's the 1911 stuff? Is this the K or the full-length?