Colt AR15-A4 100-yd target

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Just had the chance to shoot @ 100 yd. using Trijicon's TA31RCO-A4CP scope

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Federal .223 55 gr

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Federal Independence 5.56mm 55gr

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AE 5.56mm M855 62gr green tip


I had great results with .223, but with the other 2 targets, are those the expected results for 5.56 ammos?


Would really like to see results beyond 100-yd but this is the max. range @ my club.
 
You don't really have a precision set up there.. so it's hard to tell much if anything from the group's. Realistically it's doing what an AR with a trijicon is meant to do .. hit what you're pointing at ... if you want to know your rifles accuracy potential , you'll need a scope with a fine x-hair and shoot off a bench
 
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Your group sizes seem comparable regardless of ammo. If you are judging your results by your shots at the centre of of the target, it might be due to the ammo you used to zero your optic. A change in point-of-impact is not unusual when changing ammo.
 
What reticle does that have-sorry I'm not up on all the Acog models. It's hard to have a repeatable hold with a 3.5x scope with a fat reticle.

I have an RCO with the chevron reticle and find it works best using those standard zeroing targets with the 4 diamond shaped aiming marks in each corner. I hold the top of the chevron to the bottom of the diamond aiming mark.

I also put tape over the fibre optic to turn off the illumination on the reticle for daylight target plinking. To my eyes it's too washed out looking under full illumination to get a precise hold.

Remember that scope was made to hold minute of man, in all sorts of crappy light conditions and to aquire a sight picture quickly so it takes some work to hold and break repeatable "precision" shot groups with it.
 
What everyone else said about it not being a real precision optic, putting tape on the fiber optic tube etc. We'll see how it does with an OS4X soon

I find my Colt AR15A4 is a 1.5-2" rifle with a good bullet, sometimes better but not enough to guarantee, and it is about 3-4 MOA with M193 an M855 which says a lot more about the quality of US mil spec ammo than it does the rifle. It blows my mind that people actually pay more for Fed. green tip. It is straight garb.

With a better optic and a good trigger, I know it would group tighter. For a military grade rifle with a non free floated barrel though, works for me.
 
You haven't told us whether we are seeing the accuracy of the rifle, or whether we are seeing the shooter...

Is that off hand?

Bench rested?

(Bench technique definately matters, how practiced a bench rest shooter are you? )

Or something in between?

How many mag changes? I note some targets with 20+ holes, 5 mag changes?

Are you noticing typical semi auto first round shift?
 
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Pr589 said:
Your group sizes seem comparable regardless of ammo. If you are judging your results by your shots at the centre of of the target, it might be due to the ammo you used to zero your optic. A change in point-of-impact is not unusual when changing ammo.
Click to expand...

Does this mean I have to dial in the scope when using different ammos... hmmmm
 
njohnson said:
What reticle does that have-sorry I'm not up on all the Acog models. It's hard to have a repeatable hold with a 3.5x scope with a fat reticle.

I have an RCO with the chevron reticle and find it works best using those standard zeroing targets with the 4 diamond shaped aiming marks in each corner. I hold the top of the chevron to the bottom of the diamond aiming mark.

I also put tape over the fibre optic to turn off the illumination on the reticle for daylight target plinking. To my eyes it's too washed out looking under full illumination to get a precise hold.

Remember that scope was made to hold minute of man, in all sorts of crappy light conditions and to aquire a sight picture quickly so it takes some work to hold and break repeatable "precision" shot groups with it.
Click to expand...
Same as yours, reticle is chevron. This RCO-A4CP is particularly calibrated for 20" barrels.
 
Joel said:
What everyone else said about it not being a real precision optic, putting tape on the fiber optic tube etc. We'll see how it does with an OS4X soon

I find my Colt AR15A4 is a 1.5-2" rifle with a good bullet, sometimes better but not enough to guarantee, and it is about 3-4 MOA with M193 an M855 which says a lot more about the quality of US mil spec ammo than it does the rifle. It blows my mind that people actually pay more for Fed. green tip. It is straight garb.

With a better optic and a good trigger, I know it would group tighter. For a military grade rifle with a non free floated barrel though, works for me.
Click to expand...

At some point, I was using .223 and wasn't able to hit an 8" gong @ 100yd, and when I swapped to M855 greentip, I heard that sound... so was thinking that m855 is better. But in my next range session, these are the targets I had and was surprised that I will be able to hit that same gong with 223.
 
Lee Enfield said:
You haven't told us whether we are seeing the accuracy of the rifle, or whether we are seeing the shooter...

Is that off hand?

Bench rested?

(Bench technique definately matters, how practiced a bench rest shooter are you? )

Or something in between?

How many mag changes? I note some targets with 20+ holes, 5 mag changes?

Are you noticing typical semi auto first round shift?
Click to expand...

This was shot bench-rested. This was my first time to shoot bench with this rifle.

Probably 4~5 mag changes with only 2 changes with 855s.

Yup, the first round shift way off on semi-auto.
 
Were you taking your time with the shots, or were you shooting a cadence?

As mentioned early, I'd say try another target with a more defined aiming point, something that contrasts well with the background and the aiming chevron.

Other than that, just make sure all other marksmanship principles are being applied. Even with 4x optic out of what looks like a 20" barrel, the rifle should be able to group quite well at 100 yards.
 
Henry The Yellow Dart said:
Were you taking your time with the shots, or were you shooting a cadence?

As mentioned early, I'd say try another target with a more defined aiming point, something that contrasts well with the background and the aiming chevron.

Other than that, just make sure all other marksmanship principles are being applied. Even with 4x optic out of what looks like a 20" barrel, the rifle should be able to group quite well at 100 yards.
Click to expand...

Took time for the shots. Will try another target.
 
One more thing I do, and yes this is a touch OCD: The Acog was designed to be parallax free in the vertical plane only, so in slow deliberate shooting I always align the "shadow" of the front sight base seen in the scope with the vertical stadia line of the reticle.

I know this will sound over the top for shooting a battle rifle but when I am trying to shoot for pure accuracy I try to do everything I can to add consistency shot to shot.
 
Nice looking rifle OP, but I think it should be capable of better groups.

I've got a similar set up and I'm curious how well it will shoot:

https://4.bp.########.com/-r90mQhzgDz4/Wgu5pwOYoPI/AAAAAAAArGs/hxJfHBTG8E8IzcKrVjXwoEXbIFQUKrQ4QCKgBGAs/s1600/PB142744.JPG

Guessing you're shooting standing? Or supported with just your hands?

Try what others have said....sandbag it, better magnification or shoot from prone if you can.
 
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