AR15 zeroing - how? [Archive] - Glock Talk

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MIJoe
02-08-2010, 08:50
Greetings

What is recommended zeroing distance and procedure for a 16" AR15?
Max shooting distance - can't see beyond! -would be around 200 m

Thanks for any advice

Joe

faawrenchbndr
02-08-2010, 09:34
Sight in in to shoot point of aim at 50 m
It will also be on point of aim again at 200m

chrismartin
02-08-2010, 09:51
Google: Battlesight zero

http://www.ar15.com/forums/topic.html?b=3&f=18&t=328143

X-Spec
02-08-2010, 11:44
I find zeroing at 50 meters works better for me than zeroing at 25 meters.

MIJoe
02-09-2010, 07:34
Thanks guys

I will give hat 50y/200m setting a try.

Joe

crazypilot
02-09-2010, 08:43
To make the 50/200 yard sight in a little easier, start at 25yds and get it close. You're point of impact should be 1 1/2" low at 25. Then fine tune at 50 yds.

Noodles McGee
02-09-2010, 10:06
I do either a 50 or 100yd zero with the big peep.

.
Google: Battlesight zero

http://www.ar15.com/forums/topic.html?b=3&f=18&t=328143

I use this on most of my ARs. The A1 gets a standard 50yd zero still hits pretty close at 100yd.

Daps
02-09-2010, 20:49
Should zeroing be done from a bench or can it be done standing?

crazypilot
02-09-2010, 21:57
I would do it from a bench.

Gallium
02-10-2010, 04:37
Should zeroing be done from a bench or can it be done standing?


Bench or prone over standing or kneeling. But I've done rough zeroes (as most here probably have...) from standing and kneeling.

Daps
02-10-2010, 07:36
Ok thanks guys, that's what I was thinking...

I don't have a bench...could probably make one. Could I use one of those card table and shoot from that to do my zero?

I don't have my AR yet. Will here soon though. Just trying to get the facts.

Another question, should I zero for different ammo? Let's say I have some 55gr plinking ammo and some 62gr or heavier for HD.

KDawg0007
02-10-2010, 07:52
Ammo weights can change point of impact but usually not very significantly until you get way out there in the ranges. Most irons are sighted in for 55gr. from the factory.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

Daps
02-10-2010, 08:01
Thanks for the info...Hopefully soon I'll have my mind made up on which AR. The goal is by mid Mar, early April...

Gallium
02-10-2010, 08:38
Thanks for the info...Hopefully soon I'll have my mind made up on which AR. The goal is by mid Mar, early April...

Daps,

Just zero from prone. Bring a piece of big cardboard if the ground is muddy/snowy etc.

'Drew

Daps
02-10-2010, 09:22
I've never shot prone before, would it be best to use a bi pod or some type of rest? It'll be mar/apr before I get the rifle so hopefully the ground wont have any snow on it like it does now:crying:

I shoot at our local FOP so I'll have to make sure there is no rule about shooting prone.

I'll probably have to bite the bullet and join the larger range but it cost soooo much more. FOP is like $30 a year :)

Thanks Drew

X-Spec
02-10-2010, 09:29
Use which ever method that gives you the best accuracy.
In most cases benchrest will provide this.

Gallium
02-10-2010, 09:48
I recommended prone because you said you have no bench. I inferred that to mean you were out in the sticks or something, shooting in the wild.

Chances are, your range does have shooting benches. The goal is to keep the rifle in an undisturbed position. When I zero I use a spotter, so no one has to walk out to the target, and so that the shooter does not have to move about much, except to adjust the sights.

'Drew

crazypilot
02-10-2010, 10:19
When I zeroed my ACOG I just laid on the ground and laid my rifle on my Camelback. Worked just fine.

Daps
02-10-2010, 11:04
I recommended prone because you said you have no bench. I inferred that to mean you were out in the sticks or something, shooting in the wild.

Chances are, your range does have shooting benches. The goal is to keep the rifle in an undisturbed position. When I zero I use a spotter, so no one has to walk out to the target, and so that the shooter does not have to move about much, except to adjust the sights.

'Drew

It's the FOP man I doubt it LOL well there are some under the over hang but I'm not sure if they're movable. I'll just bring a stand I got from home to be safe. I can make work.

MistoGators
02-10-2010, 16:38
We always zeroed in on a small paper target at 36 yards (to simulate 300 yards) in the prone.

Alaskapopo
02-10-2010, 17:28
I do either a 50 or 100yd zero with the big peep.

.


I use this on most of my ARs. The A1 gets a standard 50yd zero still hits pretty close at 100yd.

You should use the small peep not the large one for zeroing unless your sight is same plane then it does not matter. The large peep is for close range shooting and night shooting. (less than 50 yards) The small peep is for all other shooting. If you sight with the large peep you will be off with the small peep.
Pat

ArmoryDoc
02-10-2010, 18:42
Three different zero methods here. I use the USMC method listed.

http://ar15zeroing.com/

ronin.45
02-10-2010, 19:36
I just sight in at the distance where I want the gun to be on.
I like 100yards. With the flat trajectory of the .223 you will be able to hold dead on out to your 200 yard max and beyond without any problem.

All the people who mention sighting in at one distance to be on at another are not taking into account that everyone has a different aiming device. I like my aimpoints in high mounts. Some like low mounts or Eotechs that have a unique mounting height. Some are using stock sights and many have various brands of aftermarket BUIS. All of these variables change the relationship between bore line and sight line which will change the trajectory. Just sight it in at 100 and be done with it.

X-Spec
02-10-2010, 21:09
I just sight in at the distance where I want the gun to be on.
I like 100yards. With the flat trajectory of the .223 you will be able to hold dead on out to your 200 yard max and beyond without any problem.

All the people who mention sighting in at one distance to be on at another are not taking into account that everyone has a different aiming device. I like my aimpoints in high mounts. Some like low mounts or Eotechs that have a unique mounting height. Some are using stock sights and many have various brands of aftermarket BUIS. All of these variables change the relationship between bore line and sight line which will change the trajectory. Just sight it in at 100 and be done with it.

If you sight in a 100 yards you will be low at anything past 100 yards.

ronin.45
02-11-2010, 00:43
Using standard 55gr. ammo and a 100 yard zero you will only be about 8" low at 300. Considering that 300 yards is about the effective range of a .223 for the average person you could aim center mass and make good hits on a human. For a skilled shooter with magnification you could easily hold over for longer range.

If you sight in at 25 yards with a 2.5" sight/boreline offset you will be about 7" high at 100 yards. So now you have to hold low at moderate ranges and hold high for long range. It just doesn't make sense.

Remember, just because the military does something it doesn't mean it's right.

X-Spec
02-11-2010, 06:58
Using standard 55gr. ammo and a 100 yard zero you will only be about 8" low at 300. Considering that 300 yards is about the effective range of a .223 for the average person you could aim center mass and make good hits on a human. For a skilled shooter with magnification you could easily hold over for longer range.

If you sight in at 25 yards with a 2.5" sight/boreline offset you will be about 7" high at 100 yards. So now you have to hold low at moderate ranges and hold high for long range. It just doesn't make sense.

Remember, just because the military does something it doesn't mean it's right.

Yeah but if you zero at 50 meters then you will be 1.4 inches high at 100 meters and right on at right on at 200 meters.

JCROWNII
03-13-2010, 21:29
how do I zero in using a troy industries BUIS. Those dont have elevation, they only have windage.

Alaskapopo
03-13-2010, 21:54
how do I zero in using a troy industries BUIS. Those dont have elevation, they only have windage.

Even on standard A2 sights you are not supposed to use the rear sight for elevation adjustment. That knob is a bullet drop compensator. You use the front sight for elevation. Here is a target to help you out.
http://i59.photobucket.com/albums/g299/355sigfan/1-11-200974615PM.jpg

Exodus.
03-13-2010, 22:38
Keeping the BZO at 50 and 200 are in all reality perfect for the 5.56. Only other reasons to sight in any other BZO is for unique engagements where long range shots are required. So unless you plan on engaging targets outwards of 500, then that 50m BZO will be more than adequate. For extreme CQB engagements, your at worst case an 1 1/2" low, still well within center mass.

As for sighting in, the more solid and steady the rest, the better the zero. If you want to use a card table fine, a picnic table would be better, heavier, more solid. When you lay in the rifle, work it into the bags or whatever rests you are using, nest it in so when you look down the sights, the target is lined up in the sights. Dont pull it around when you are shooting, nest it in so the rifle is naturally sighted as close to the POI as possible. You can sight it using your 55gr plinker ammo, but make sure and check a group of the 62 HD loads to make sure nothing is funny. You didnt give any info on ROT, so if you have a barrel that has a slow rate of twist, then those 62gr might not work at any medium range. Good luck.

ArmoryDoc
03-14-2010, 00:42
I use the improved BZO for my M4's. 50 / 200 yards.

RWBlue
03-14-2010, 15:13
I have been running the numbers. Make your own decisions.

http://www.biggameinfo.com/index.aspx?page=%2fbalcalc.ascx
Yes, it is in yards.

0.224 Diameter
0.235 Ballistics Calculator
62 Bullet Weight
2954 Velocity (M855 from 16inches)

0.224 Diameter
0.243 Ballistics Calculator
55 Bullet Weight
3107 Velocity (Partizan M193 from 16inch barrel, Guatamalan M193 3057fps)


BTW, Wolf 62gr chronoed at 2811 on day and 2821 the next.

The observed shots would be interesting.

hdbob
03-15-2010, 11:32
This is what I did


Even on standard A2 sights you are not supposed to use the rear sight for elevation adjustment. That knob is a bullet drop compensator. You use the front sight for elevation. Here is a target to help you out.
http://i59.photobucket.com/albums/g299/355sigfan/1-11-200974615PM.jpg