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Old 03-09-2018, 10:58 AM
amadeus76 amadeus76 is offline
Join Date: Apr 2014
Posts: 132
Default 1903a3 200m zero w/ a 25m target?

Simple question... If I'm zeroing a 1903a3 on a 25m target using standard 150gr ball, how high above my POA should my POI be for a 200m zero?

Same question for a 1903a4 using 168gr pills for 100m on a 25m target?

Last edited by amadeus76; 03-09-2018 at 11:27 AM.
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Old 03-09-2018, 11:09 PM
lapriester lapriester is offline
Join Date: Oct 2009
Location: Cobb, N California
Posts: 16,388

About 2" for either. In almost all cases, except for maybe the heavies, 2 clicks is generally very close from 100 to 200 yard zero.
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Old 03-10-2018, 07:41 AM
XTrooper XTrooper is offline
Join Date: Mar 2018
Location: PA
Posts: 38

There are many variables, of course, but if you sight-in your rifle to impact dead-on @ 25 yards with a standard 150gr .30-06 FMJBT load (~2910 fps MV, ~.408 BC), you should be very close to dead-on @ 200 yards.

If you're looking for a ballistics calculator, Ballistic Advanced, JBM Ballistics Calculator is a decent, relatively inexpensive option. I think I paid $12 for the iPhone app version.

At 100 yards (or meters), the results will be virtually the same for the 168gr load. You won't see any significant difference between the two until to get out to greater distances.

lapriester is correct. With a 25 yard zero, you will be approximately 2" high @ 100 yards with either load.
New Jersey State Trooper #3936 (retired 4-1-1991)
NRA LE Firearms Instructor

Last edited by XTrooper; 03-10-2018 at 07:47 AM.
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Old 03-10-2018, 07:45 AM
Carriec Carriec is offline
Join Date: Dec 2013
Location: Virginia
Posts: 319

I'm shooting both HXP68 and Federal GMM. Same POA. My eyes are shot so I have to use line of white. Shooting 8" shoot and see targets at 100Yd. I have an "A" front sight blade and bottom the rear aperture at an indicated 200. Goes right in the X. Well.... sometimes.
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