The Zero that works on all AR-15's

Kiloxj

New member
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The point of this is that the 3 rifles above are all very different and all are zeroed the same BUT WHEN I DOPE THEM AT LONGER THAN 300 THE DIFFERENCE IS EVIDENT, BUT THAT IS NOT THE POINT.

Above is my Smith 16" 1/9 with Comp M2, my 16" 1/7 Spikes upper on a Seekins Lower, and my RRA 20" 1/9 Coyote with Zeiss 3x9x40. They all have a 37 yard Zero and all have the second point of zero at 300 yards. This will give you a 4MOA trajectory out to 300 so a dead hold is always a kill shot. I shoot a 55 in the smith, a 53 VMAX in the 20", and a 75 TAPFD in the Spikes 1/7. All have the same zero and all give me a 4MOA trajectory out to 300 yards. I have over 1000 rds Through the Smith, 2000 through the RRA, and I just Zeroed My new build today the same. What I am getting at is a 37 Yard zero for most people is simple and you always have a dead center hold and always dope for your wind. Of the 21 Competition AR-15's I have %90 are Aimpoint Comp M2 and M4 with 2MOA dot and a 37 yard zero. The scopes are all 37 yard zero and I know hope to dope the weapon because I average at least 1000 rds a year from every weapon. As long as the zero and the Round you zero is used with the specified barrel, then this is too simple and effective to get complicated. I shoot out to 800 and that took 16 rds from the 1 shot out of the 24" .936 1/8 upper using a 75 gr Hornady TAPFD.

Please post ant feedback and disagreements you may haave
 
With the RRA 20" shooting 53gr VMax sighted in at 300yds what is your POI at 150 yds to 200 yds which is a common shot for predators.
I would guess it to be over 3" high which will cause a lot of high misses IME.
 
Originally Posted By: venaticWith the RRA 20" shooting 53gr VMax sighted in at 300yds what is your POI at 150 yds to 200 yds which is a common shot for predators.
I would guess it to be over 3" high which will cause a lot of high misses IME.

Thats my thought as well. The convience of being MPBR at 300 doesnt seem effective when you consider the 3" high at 100 yards. IDK, maybe it is easier to judge "come down" at 100 vs "come up" at 300?
 
I shoot 68gr hornady from my .223 which is sighted in at 200yrds. Im 2.5in high at 100yrds and 8-9in low at 300yrds. From that im thinking his poi has to be much higher than 3in at 100yrds. For me a 300yrd dead hold is just not needed for coyotes when you consider average shots are between 100-200yrds. Just my $.02
 
i used to zero my predator rifles the same as my big game rifles. one year i had a few misses on coyotes at about 100 yards. finally decided that a 3" high at 100 yards may work well for big game, but when the animal you are after has a chest that is maybe 8" top to bottom, it is too high.
now i have all my 223's sighted to zero at 200 yards. that puts me within about 1.75" of the line of sight from 20 yards to about 225yds. 3" low at 250, 7 inches low at 300 IIRC. usually if i am shooting much beyond 200 i have a little more time to take the shot and correct for the distance.
with my current 200 yard zero, my misses dropped. but since then i have made several kills over 400, and one over 600.
 
Originally Posted By: Tim NeitzkeA 300 yard zero on an AR is just plain foolish for normal hunting condtions.

But, but, but, he says it's zeroed at 37 yards too.
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Calling rifles? I give mine a 100 yard zero and it works for me.
 
Around 4 inches, way to high for me.Originally Posted By: venaticWith the RRA 20" shooting 53gr VMax sighted in at 300yds what is your POI at 150 yds to 200 yds which is a common shot for predators.
I would guess it to be over 3" high which will cause a lot of high misses IME.
 
Originally Posted By: doggin coyotesOriginally Posted By: Tim NeitzkeA 300 yard zero on an AR is just plain foolish for normal hunting condtions.

But, but, but, he says it's zeroed at 37 yards too.
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Calling rifles? I give mine a 100 yard zero and it works for me.

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I remember reading somewhere that a 55grn bullet in a .223, if zero'd at 40yds was zero'd at 195yds.

For the sake of experimentation, I zero'd my 7mm RM at 60yds and was within an inch (high) of a bull's eye at 200yds. I'll try that again closer to deer season and see how the temps impact the poi.

While the effective range of today's ARs is prob +/- 400yds, I'd keep the shots closer to 200yds in extreme occasions, but that's predicated on the environment in which I usually hunt in.
 
My ar is a tool first and I hunt with it for practice. Tjat said, I prefer a santos improved battle sight zeeo. Check it out. Its basically a 50/200 meter zero. Obviously a true 50/200 is with a specific barrel and.load, but my 55gr are close. Sight in at 50 and be dead on coyote zeroed just past 200.
 
Most of my shots are around 75 yds so 100 works great in .223 for me?

The 50/200 yds Zero works out perfectly with the 6.8.
 
Good info!!

I set up my AR's to let the area that I am hunting dictate my zero.

I have my zero set at 300 because I hunt a lot of horse farms and cow farms that are wide open and provide oppurtunity for shots at all ranges.

If I am hunting one of my tighter spots I can drop my Trijicon 2.5 x 10 x 56 down 4 clicks elevation to zero at 250 or 6 clicks for a 200 zero etc etc. Down to a 100 yard zero if needed.

I have a .204 AR that I have set up the same way as the .223 AR. The .204 is a little flatter and faster but for my longer shots I do like the .223 better.

For close up shot's I have a Trijicon RMR on zero for 10-25 yard shots. Having the RMR saves me carrying a shotgun along with my AR like I did for the first 25 years of chasing old wiley.

Prior posted info on this forum has helped me and I hope passing this along will help some of you. I look for any advantage I can find and use to kill coyotes.
 
XM855 62 gr XM193 55gr

Meter Velosity Trajectory Drift Meter Velosity Trajectory Drift
0 3,100 -2.5 0 0 3200 -2.5 0
100 2,751 4.4 1.1 100 2774 2.8 1.3
200 2,420 5.8 4.9 200 2374 2.7 5.8
300 2,115 0 11.8 300 2012 -4.9 14.2
400 1,883 -15 22.4 400 1680 -23 27.6
500 1,569 -42.9 38 500 1373 -56.2 47.5


"NATO specifications for SS109 (U.S. M855) Ball require a 61.7 grain
(q 1.5 grains) with a hardened steel penetrator at a velocity of 3,025 fps
(q 40 fps) from a 20 inch barrel 25 meters from the muzzle. Typical
velocity 15 feet from the M16A2's muzzle is around 3,100 fps. The accuracy
requirement from a test fixture equates to a maximum of approximately four
MOA over the 100 to 600 yard range. Typical accuracy of average lots in an
M16A2 is about 2+ MOA. This round must also penetrate a nominal 10 gauge
SAE 1010 or 1020 steel test plate at a range of at least 570 meters (623
yards). The M193 round will penetrate this same plate reliably at 400
yards, and about half the time at 500 yards. The 5.56mm and 7.62mm NATO
rounds will penetrate it reliably out to 700 yards or more. Nominal
ballistics for M193 and M855 Ball rounds are given in an accompanying
table. The tables were constructed from the latest data supplied by the
U.S. Army Ballistic Research Laboratory at Aberdeen Proving Ground,
Maryland.
5.56 NATO Ball Ammunition Ballistic Comparison
based on Aberdeen Proving Ground Data

* Drift for 10 mph wind.
M193 Ball ammunition fired in M16A1 rifle with 250 meter battle sight zero.
M855 Ball ammunition fired in M16A2 rifle with 300 meter battle sight zero.

XM855 .304 B.C
 
I have always used a center POI from me to the target with the 37 yard zero.


And all zero's can be defined at either the first or the second point. The round should and will drop and at 25yards the bullet hits first if fired with no POI and no target. A .223 always will drop then rise out of the barrel as long as your LOS target is at 90 degrees. So the charts above show the 300 yard zero. 300 is second pont of zero, but the first is 37
 


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