100 yard sight zero possible?

[jmoore]

If you want to go to the trouble of lowering your point of impact 2", you'll need a 0.0176" taller front sight. (It works out to be about 0.0088" per inch of movement assuming a 31.7" sight radius and exactly 3600" to the target.)

It sounds mighty close to me! Check your load- Original 30'06 spec'ed a 150 gr flat base bullet at 2700fps out of a 1903 Springfield: I've found that the extra inch of barrel doesn't change the velocity much, if at all. A heavier bullet or a faster one could account for the slight variation you're getting.

BTW The sights do seem to be correctly regulated for me out to 600yds w/ M2 ball when the zero is right at whatever the checking distance.

[three0three]

If you want to go to the trouble of lowering your point of impact 2", you'll need a 0.0176" taller front sight. (It works out to be about 0.0088" per inch of movement assuming a 31.7" sight radius and exactly 3600" to the target.)

It sounds mighty close to me! Check your load- Original 30'06 spec'ed a 150 gr flat base bullet at 2700fps out of a 1903 Springfield: I've found that the extra inch of barrel doesn't change the velocity much, if at all. A heavier bullet or a faster one could account for the slight variation you're getting.

BTW The sights do seem to be correctly regulated for me out to 600yds w/ M2 ball when the zero is right at whatever the checking distance.

thanks buddy, that helped a lot

[eldowerks]

my group at 100 yards set at 200 is 3-4" high

If you use a six o'clock hold on a 6" bullseye, then you are just about right on, MILSURPGUY1917. Your rounds should be right on the X ring to an inch above.

From the field guides that I've read from that period, the six o'clock hold was standard:

From the BASIC FIELD MANUAL
U. S. RIFLE, CALIBER .30
M1917 (ENFIELD)

If your rifle is zeroed at 200 yards: using the 200 yard ladder setting, your rounds should hit about 2" higher at 100 yards than they will at 200 yards.

[Randy A]

He's right the manual does require 6 o'clock hold. Here is the site you can download it from. It looks like you might have to copy and paste in your browser. It can also be found at the bottom of the wikipedia site on a M1917 enfield search.

FM 23-6 Basic Field Manual: U.S. Rifle, Caliber .30, M1917, 20 October 1943

[Randy A]

I guess that doesn't work, try this, it's at the bottom.
M1917 Enfield - Wikipedia, the free encyclopedia