Scoped 5.56 trajectory help!!!!!

[35remington]

Was in the Army back in the day so am familiar or used to be with this weapon system. Never scoped one before. We would zero at 25 yds I think and were taught to aim low at 50 and high at 150 to hit center mass with the M16 using iron sights. I scoped a good quality AR with a digital NV scope. Zeroed at 50 yds and can hit bullseye. Recently I have been hunting a feeder at 125 yds off my tank for hogs. Last two tries cross hairs right on the skull and nothing. Checked zero again today at 50 and right on.

I am thinking of just putting this scope on my 30.06 and be done with it. Can you scope an AR with the trajectory of the round? When I think back now on my military days and trajectory training my round cant possibly be going in the same place at 50 as 125 to 150.


Please help.


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Stop putting the crosshairs on the skull.

[Ætheling]

Have you chron'd the load?

Physically verified POI at different ranges?

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I'm going to verify poi today at 50 yd increments. I'm using a digital scope and will also shoot a different zooms to ensure its holding the same zero. The cross hair moves and then seems to move back as you zoom in and out.

[DesertDug]

I like 50 yard zero. MOPig for 200 yards!

[Wylde E]

Yeah I would say shoot paper at 150. Is your rifle 1-7 or 1-9 twist? May not stabilize 65gr past your 50 yd zero.


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[Wylde E]

I can pretty much shoot any 55gr round through mine and it's perfect. I've shot 2 pigs and 2 coyotes with my night vision setup. The coyotes were side by side at about 130 yards both DRT. One of the pigs I shot was around 300lbs and he took 2 rounds and made it about 60 yards. Those soft points are pretty lethal.


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[rosco11]

I use the 50 yd zero with a 1:7 twist and 62gr 556. 1-4x scope (pic shows when i had EOtech on). My feeder that pigs took over is at 110. i put down 7 pigs this past season. I aim 1" low behind the shoulder at 105-120yds. Haven't missed. All 7 went down within 50 yds 3 went less than 5. Biggest pig about 100# or so.

[35remington]

Interesting. I look at the same chart and see that the 50 yard zero is better than 100 in all respects. Just look at the curve. If you zero at 50 you can hit a 2 inch target anywhere inside of 250 yards just by putting your crosshairs on dead center.

What are you seeing on this chart that makes you pick a 100 yard zero?

[Mike D]

Interesting. I look at the same chart and see that the 50 yard zero is better than 100 in all respects. Just look at the curve. If you zero at 50 you can hit a 2 inch target anywhere inside of 250 yards just by putting your crosshairs on dead center.



What are you seeing on this chart that makes you pick a 100 yard zero?

Yep. My 5.56 AR is zero'ed at 50. So at 200 I'm back at zero. That's as far as I'm gonna shoot any much of anything with a 5.56 AR anyway.

[Ætheling]

Scoped 5.56 trajectory help!!!!!

So with my rifle configuration and ammunition zeroed at 50 I was 3 inches low at 100 on paper. I zeroed to 100 and it seems to be more stabilized from 50 and out now. So many variables that take place but my situation best resembled the first article posted. The ATN X sight is also a monster scope so the rectile is fairly high off the weapon.



Thanks for all the help.


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[Mike D]

So with my rifle configuration and ammunition zeroed at 50 I was 3 inches low at 100 on paper. I zeroed to 100 and it seems to be more stabilized from 50 and out now. So many variables that take place but my situation best resembled the first article posted. The ATN X sight is also a monster scope so the rectile is fairly high off the weapon.



Thanks for all the help.


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Hmmm. That doesn't make sense. A 50/200 zero is pretty much the standard for a battle zero. I wonder if the digital scope on the X sight messes with something.

[SC-Texas]

Because something made by AtN has never failed to hold a zero

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[mcfactory7]

So with my rifle configuration and ammunition zeroed at 50 I was 3 inches low at 100 on paper. I zeroed to 100 and it seems to be more stabilized from 50 and out now. So many variables that take place but my situation best resembled the first article posted. The ATN X sight is also a monster scope so the rectile is fairly high off the weapon.



Thanks for all the help.


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What is the height over bore (HOB) of your scope? That plays a huge role in all of this. If the HOB is different than most iron sights or scope mount (2.5-2.8" for most sights or mounts) then your trajectory will be very different than the displayed chart.

I would also look to at group size to make sure the scope is actually holding zero and shoot all groups regardless of distance at the same zoom level. You want to remove as many variables as possible.

[Horitexan]

Hmmm. That doesn't make sense. A 50/200 zero is pretty much the standard for a battle zero. I wonder if the digital scope on the X sight messes with something.

X2! Lol.

I've read this thread twice and I'm still confused - lots that's not making sense to me. 3" low at 100 when zeroed at 50?? Wth? Lol. Maybe shooting subs?

If your shooting pigs at 125, sight it in at 125 because something doesn't seem right with the rifle/scope/load combo.


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[stxhunter]

Wait, if you're using an X-sight, have you updated the firmware? They had an issue early on with the scopes shifting zero while zooming. Are you at different zoom levels at 50 and 100? What firmware are you running on the x-sigh?

[Coyote Canyon]

I'm trying to figure out why he is shooting at the head. I aim at the biggest part of a pig. Success rate is 100%.