zeroing AR
I have a Colt A3 Elite 1/9 twist. Shooting 62 grain LC ammo. This is a stainless 24" ( 6724 ) barrel. Gun came with 4-16 scope. I have a range that is 200 yds long. Put this thing on paper yesterday. 10 shot groop off a bench with bags---.7 inch, but 16"s high. Windage was perfect. This rifle was used when I got it from local gun shop. Anyone have an idea what distance this thing was zeroed at---- my guess is 600 yds or better.[;)]
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Just change it to suit your preferred range. What diff does it make what it was zeroed for previously???? 0 -
50 yards, with the high eight plane this would put it very high at 200 0 -
I think your guess at 600 yards is dead on. .7" at 200 yards that Sir is a keeper rifle.
I used 62 gr with a BC of .270 at 3000 fps and a 600 yard zero produces 16.9 high at 200 yards in the Hornady Balastic Calc
http://www.hornady.com/ballistics-resource/ballistics-calculator0 -
The only difference between an A2 & an A3 is that the A3 has a removable handle/rear sight assembly (I think).
At http://www.armystudyguide.com/content/army_board_study_guide_topics/m16a2/zero-and-m16a2-rifle.shtml you will find the US Army instructions for sighting in a M-16A2.
Law Enforcement Targets has the targets at: http://letargets.com/estylez_ps.aspx?searchmode=category&searchcatcontext=~060000~060100~060110
I found an A2 Army sight-in target on line (free) somewhere, but I cannot remember what the web site was. The sight in info on my target reads:
1: Set rear sight elevation to one click past the 8/3 setting.
2: Aim at target center and adjust sights to bring shot groups as close as possible to the center of circle. Adjust the FRONT sight for elevation only.
3: Set rear sight elevation back to 8/3 setting. Weapon will be zeroed for 300 meters.
If it is sighted in for 300 meters you should be able to hit a human size target anywhere from 10 to 300 meters. It will not be bulleye accurate, but will get the job done. I find that if I zero my A-4 at 25 meters it will shoot 8" high at 100 meters. Any further than the bullet starts to drop until at the 300 meter distance it should cross back into the weapon's line of sight.
Clear as mud? I hope this helped.0 -
OP said rifle had a 4-16 X scope so open sight(if it has them) setting is irrelevant.
Again, those knobs are there for a purpose.0 -
quote:Originally posted by MIKE WISKEY
50 yards, with the high eight plane this would put it very high at 200
With my EoTech on a flat-top a 50 yd. zero puts hits 1.5-2 in. high at 100 yds. and then dead on again at about 225 yds.
Not much difference in height between it's reticle and that of a scope.0 -
quote:Originally posted by 1sgret
The only difference between an A2 & an A3 is that the A3 has a removable handle/rear sight assembly (I think).
At http://www.armystudyguide.com/content/army_board_study_guide_topics/m16a2/zero-and-m16a2-rifle.shtml you will find the US Army instructions for sighting in a M-16A2.
Law Enforcement Targets has the targets at: http://letargets.com/estylez_ps.aspx?searchmode=category&searchcatcontext=~060000~060100~060110
I found an A2 Army sight-in target on line (free) somewhere, but I cannot remember what the web site was. The sight in info on my target reads:
1: Set rear sight elevation to one click past the 8/3 setting.
2: Aim at target center and adjust sights to bring shot groups as close as possible to the center of circle. Adjust the FRONT sight for elevation only.
3: Set rear sight elevation back to 8/3 setting. Weapon will be zeroed for 300 meters.
If it is sighted in for 300 meters you should be able to hit a human size target anywhere from 10 to 300 meters. It will not be bulleye accurate, but will get the job done. I find that if I zero my A-4 at 25 meters it will shoot 8" high at 100 meters. Any further than the bullet starts to drop until at the 300 meter distance it should cross back into the weapon's line of sight.
Clear as mud? I hope this helped.
AnA3 may or may not have a removable carry handle I have 5 of them and none have a removable carry handle because I just don't choose to use one.0 -
quote:Originally posted by 1sgret
The only difference between an A2 & an A3 is that the A3 has a removable handle/rear sight assembly (I think).
At http://www.armystudyguide.com/content/army_board_study_guide_topics/m16a2/zero-and-m16a2-rifle.shtml you will find the US Army instructions for sighting in a M-16A2.
Law Enforcement Targets has the targets at: http://letargets.com/estylez_ps.aspx?searchmode=category&searchcatcontext=~060000~060100~060110
I found an A2 Army sight-in target on line (free) somewhere, but I cannot remember what the web site was. The sight in info on my target reads:
1: Set rear sight elevation to one click past the 8/3 setting.
2: Aim at target center and adjust sights to bring shot groups as close as possible to the center of circle. Adjust the FRONT sight for elevation only.
3: Set rear sight elevation back to 8/3 setting. Weapon will be zeroed for 300 meters.
If it is sighted in for 300 meters you should be able to hit a human size target anywhere from 10 to 300 meters. It will not be bulleye accurate, but will get the job done. I find that if I zero my A-4 at 25 meters it will shoot 8" high at 100 meters. Any further than the bullet starts to drop until at the 300 meter distance it should cross back into the weapon's line of sight.
Clear as mud? I hope this helped.
What length barrel does your A4 have? I got out of the service just before the Army adopted the A2. If you ever carried a CAR-15 (closest thing we had to the M-4), they were still zeroed at 25m you just had to hold over the 300m target instead of just above center-mass. Remember, that was all M193 not M855.
Anyhow, my question was what you had highlighted. Most all of my rifles scoped or unscoped with a bullet moving right close to 3000 fps, the 100 yd. POI is almost always right at 4" high to also hit center mass @ 300. With a shorter barrel you might not be getting the velocity?0 -
I plugged the info you gave into my shooting program and assumed a 55gr bullet/ factory load.
It told me you will be 14" off @ 200yrds with a 400 yard zero.
Hope that helps you out.0
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