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View Full Version : Help with AR Zero at Chabot Gun Glub


Arkangel86
04-11-2011, 10:30 AM
So Chabot Gun Club changed their rifle range from 25 yards to 20 yards.

Is it possible to Zero my AR for 25/300 on the 20 range?

Thanks in advance

dieselpower
04-11-2011, 11:14 AM
It would be guessing on accuracy. keep in mind 25 yard zero has more error in it then 50 yard or more. The longer the zero the more accurate.

If I have had enough coffee to figure this out...I think point of impact 2 inches lower than point of aim will give you a cross zero of 375ish yards

IPSICK
04-11-2011, 2:56 PM
Is this for A2 style irons? If so...

Anyone care for some RIBZ (http://www.ar15.com/forums/topic.html?b=3&f=18&t=328143)?

If not, then figure out the adjustment for 200 yard zero using a 100 yard range. Then confirm zero on a 200 yard range when you get a chance.

The trajectory for a 300 yard zero is not very flat and requires quite a bit of compensation.

50 yard / 200 meter zero is more useful than a 25m / 300m zero to me. If using optics, I thought most modern battle optics had bdc reticles to adjust shots for trajectory.

If you couldn't tell already, I don't have optics on my AR.

mattmcg
04-11-2011, 9:25 PM
Typically folks zero a short-range carbine at 50 yards. There is simply too much offset between the boreline and the sights on an AR to provide for a usable zero.

I personally zero at 100 yards knowing that it will only be slightly low at 50 yards and 150 yards.