Technical: Zeroes- sighting-in clarifications

[sturmgrenadiere]

At what rear sight setting does one zero and FAL at? For example, with the rear sight at 300 yards, we BZO our M16A2s at either 36 or 300 yards for a 300 yard BZO, and colt tells me to BZO my AR at 25 yards for a 300 yard BZO (not sure about the 11 yards disparity unless for some reason 62 grain ball travels that much differently than commercially available 55 grain stuff at that range, which it doesn't, but I'll leave this for the AR board).

Anyway, with an FAL, where does the rear sight need to be set to get a BZO at 300 yards (assuming that is the proper battle sight zero range), or at what setting for what range?

Thanks

[HKgnnr]

Sorry for the ignorant sounding question, but I need your help.

Belgium rear sight with 2 dot front sight post.

Having a bit of a sighting in problem. First off, what is the 'correct' sight picture? Should I:
1) Be leveling the bottom of the front sight post with the bottom of the rear peep
OR
2)Should I be centering the entire front sight post/ears within the center of the field of view of the rear peep?

Next question, Ive read the FN manual and it makes reference to the MPI. Still confused. As I'm shooting now, the front sight is down as far as it will go, and in order for it to even hit approximately 12 inches high at 100 yards, I must hold the sight picture of my first example - number 1. Centering the front sight and were talking groupings approximately 18" high from the point of aim

I must be doing something wrong obviously - and a limited supply of ammo prevented me of trying further.

Have I been adjusting incorrectly? Should I be in fact 'unscrewing' the front sight post UP, to bring my groups down to my point of aim?

********************************************
After a bit of searching, it appears I need to raise the front sight post up approximately 26-46 clicks to equal my point of impact of 10"-18" high depending upon the correct sight picture.

Is this correct? Thanks in advance!

[Kilowatter]

To use peep sights you just look through the peep and focus on the tip of your front sight and the target.Your eye will naturally center the tip of the front sight in the rear peep aperature. Raise the front sight to lower the point of impact.

[EMDII]

As KW has indicated, you move the rear sight in the direction you wish to move MPI (Mean Point ofImpact). Left is left.

Move the foresight post in the opposite direction you wish to move MPI. Screwing the sight in (down) forces you to raise the muzzle for compensation. Thus (at BZO range) the MPI moves up.

The backsight is click for click, do an equal number of clicks on the left and right screws.

For both sights, 1 click moves MPI 1cm @ 100m. Try to zero at 200m, w/ the backsight set to 200m. If you cannot, then a 25m zero is just fine. For a 250m BZO with 147gr ball NATO-spec ammo, about 4cm high at 25m is great. Fire 3-round groups, adjust, and confirm after your final adjustment.

HTH
http://www.fnfal.com/forums/wink.gif

------------------
1*.....Train Like You Fight: Second Place is NOT an Option.

E.M. (Ted) Dannemiller II

[HKgnnr]

Thanks a million fellas! I've sighted in both AKs, ARs and a bevy of others, but for some reason, I just couldnt get this one in right. Ive noticed that the rear sight shoots a lot of glare and is a bit too distracting due to the 'wide' sight picture.

I think that I'd be better served with the hooded sight from DSA. In the meantime, I've darkened the rear sight with flat black permanent marker to cut back on the glare.

Thanks again!

[EMDII]

Try to get a Canadian rotor, or British Hythe. The DSA hooded is OK, but the base is still wobbly, compared to the other two.

http://www.fnfal.com/forums/wink.gif

------------------
1*.....Train Like You Fight: Second Place is NOT an Option.

E.M. (Ted) Dannemiller II

[sturmgrenadiere]

At what near range do you zero an FAL for what BZO? What range zero is the rear sight calibrated for throughout it's range of adjustment (basically the same question, huh)?

[chet]

Would like to hear the answer to this one, too. Posted to keep it up.
Chet

[Brad/gunthings.com]

The starting (lowest setting) is 200 meters. I would zero it at 200 meters if possible. If you only have 100 meter range to shoot at, adjust sights so it hits two inches high at 100 and it should be on at 200. Using ammo which is NATO spec or an approximation thereof (i.e. 147-150 gr boattail spire point at correct velocity) your rifle should hit the target when the rear sight is set to the corresponding distance.

[ErikAndersson]

With sights set on 200 metres 7.62 NATO should zero at 30 metres.

------------------
Cut the blue wire! Erik

[Wadman]

Okay, if it's zero at 30m and 200m, where is the POI at 100m?

[EMDII]

POI at 100m is about 2" high, depending on your rifle, ammo, and temperature.

See the FAQ for 'how-to' on obtaining a BZO.

------------------
1*.....Train Like You Fight: Second Place is NOT an Option.

E.M. (Ted) Dannemiller II

[This message has been edited by EMDII (edited October 11, 2000).]

[awp101]

Originally posted by EMDII:
<STRONG>For a 250m BZO with 147gr ball NATO-spec ammo, about 4cm high at 25m is great</STRONG>

If I am using the 25m zero targets we use to zero our M4s (target represents a 300m sillhoutte) with the approximately 1" "center mass" target circle, I'm wanting the pattern to be:

4cm above point of aim (hold 4cm below target to hit center mass at 25m and in center mass at 250-300m)

or

4cm above center mass (hold on center mass of target and my group should be 4cm above center mass at 25m and dead on at 250-300m)

Aye, this makes my brain hurt! :confused: :confused: :confused:

[EMDII]

Hold on the notch of the 25m target. The e-type has a notch in the bottom. Hold there. THat is POA. Your POI should be 3-4 cm higher than POA. THe Spec for the M-16 (5.56) is 1cm low at 25m, IIRC. I don't know about the spec for the M-4, or whether it differs.

[awp101]

Ok, that is where my confusion is coming from.

For the 16A2s and M4s I've always been told to group the shots in the 1" center mass circle of the 300m silhouette zero target. I do not remember the TM or FM that covers it, but every range I've been to has been done like that. None of this "group X distance above or below or hold here or there", just aim center mass.

"E"-type I've never seen, I'll scan the ones I'm using and email it, but I do not remember seeing a notch on it.

[wolfgang]

I want to set up my FAL battlesight zero at 300m.Where do I put my point of impact on a 25 m. target? I trigged out sight adjustments at different distances so I know what adjustments will give me the results I want, But I need to know how to get started. I have also noticed the Imbel front sight post has 18 detents on the bottom face ,and the others have 20. That makes quite a difference.I have a Belgian replica with 20.
I also would like to know if after this I can go to a 400 m. or 500 m. distance without having to make any other adjustments other than rear sight. I know that I have viewed other postings as we all have on this subject , but I just wanted to maximize the effectivness of my range time. Any information on this subject by anyone would be most appreciated.
The other postings have not answered all my questions.
Thank you very much,
Wolfgang

[EMDII]

Both the FAL and IMBEL manuals say 1 click = 1cm movement of POI at 100m. Forget about detents (IMBEL Manual says 16 on their foresight post), and make adjustments on that basis.

Start your BZO at 25m, w/ POI about about 4cm above POA. This is close enough for a 250m BZO, and a PBR (point blank range) of 289m. You can then adjust for 300m zero after you're on paper at 300.

Start w/ the backsight at 200, and zero at 25m as above. Once BZO'd at 25m, move your target back to 200m, and adjust until POI = POA. Subsequent adjustments need only be made by moving the backsight forward to the desired range setting. the FAL is quite capable of hitting the e-type silhouette at 600m this way.

For additional help, do a 'search' using "BZO" in all Forums. You'll be overwhelmed at how much info is there.

[brownfam]

I received my DSA SA58 Standard Rifle yesterday. I have a rifle, a pile of magazines, and a battle pack of Portugese 147gr ball ammo. I want to take her out tomorrow and sight her in but need to know the correct close range sight in distance that will correspond with the sight's 200 meter setting so point of aim is point of impact. I am guessing appx 40-50 meters, but would like something more concrete.

Help please.

Thanks in advance

[EMDII]

4cm high at 25m gives a 250m BZO (w/ backsight set at 200). This means you're slightly high at 200, which is OK. Your sight is calibrated this way

[brownfam]

Thank you sir.

[fal fiend]

25 m is how many yards ?

[bykerhd]

Boy ! THIS is an OLD thread ! Wow !

25 meters is a little over 27 yards.