Sighting my AR

Keller said:
Mine is sighted in for 50m. Sight yours in for whatever distance you will shoot most often.
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Thanks. I wonder, how guys on the field are dealing with this? If rifle is sight to 300 meters. How ofter in real life situation gun battles are happening at 300 meters and farther?
 
It is a trajectory and Height over Bore issue.

Through the magic of shooting an AR and some other rifles your 25m zero is often very close to your 200m zero.
 
Zeroing at 25yards with 5.56mm ammo will always turn your 100 yard group high, the trajectory of the bullet is rising and will rise a short while until returning to zero, anywhere from 200-320 yards depending on ammo selection. Get used of your hold offs, that's half the fun with shooting an AR.
 
At 25 meters the bullet has not even had the chance to stabilize, I would suggest you zero it no closer than 50 meters. I zero all my rifles to 100 meters, mainly due to the fact that they are all equipped with Spectre DR's.
 
id64 said:
I need word of advise here. I am sighting my AR at 25 meters using this guide
http://www.about-shooting.com/AR-15_Targets.php and all is dandy at 25 meters. But when I shoot at 100 meters it shoots about 2 inches too high. I am assuming if I shoot at 300 meters it will be OK. Is it shooting high at 100 due the trajectory elevation? What is yours set to?


TIA
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My rifles are BZO'd to 100m. From there you learn the sight off-sets you need to make it work at various other reasonable engagement distances.

As has been said by those who replied before me, the ballistic path of the round arcs up to about 100m and then begins to arc down again with .223/5.56N.
 
id64 said:
Thanks. I wonder, how guys on the field are dealing with this? If rifle is sight to 300 meters. How ofter in real life situation gun battles are happening at 300 meters and farther?
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According to the Americans, Dutch, Danish, British and Australians.........most. My comp M4 is zeroed for 200m and by aiming at the top edge I can hold a figure 12 easily at 300m.
 
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