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I have shot sub ½" group at 50 yards using 4-10 power scope. Due to weather I have not been able to get to the range to try longer yardage.
75gr Hornady BTHP
LC Case
25gr BL-C(2)
CCI 450 primer
 

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100 yards - 10 Shots, Target 5 inches in diameter.

4X scope laying down prone, no bipod or rest, just breathe easy and pull.



09 Lake City brass, CCI 400 primers, Prvi 75 grain BTHP bullets, 25.0 grains Hodgdon BLC-2 powder.
 

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about 1.25 MOA at 50 yards with a couple different kinds of ammo, about 1-2 at 100 with most things but I've found several types that will shoot much closer to 1MOA.

I've shot a 2.75 inch group at 300, but I think that was a bit of a fluke.

I think most of the error is because of me and not the gun. I think it may be a sub MOA gun in all reality.

I've had the best luck with

winchester 40gr ballistic silvertips,
federal premium 40gr nosler tips,
and black hills 69 gr jhp, although there seems to be more fliers with these

I've also had good results with
55gr Black hills fmj
75gr Black Hills hp
55gr fiocchi sp, these will group consistently and not keyhole out to 350 yards, which is as fasr as ive shot anything.

The 75gr privi partisan that is supposed to be great was mediocre in my rifle, about 2.5MOA with occasional fliers that were way off.
 

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4X ACOG Groups

I've gotten on average 1.5-2" 100 yard groups with both Hornady 52 grain HPBT and 60 grain HP's. Had lousy groups with 62 grain steel core projo's. Haven't tried any heavier projo's yet. Scope is an ACOG TA31F.
 

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Re: 4X ACOG Groups

samnev said:
I've gotten on average 1.5-2" 100 yard groups with both Hornady 52 grain HPBT and 60 grain HP's. Had lousy groups with 62 grain steel core projo's. Haven't tried any heavier projo's yet. Scope is an ACOG TA31F.
The worst groups I've ever had out of mine (far worse than wolf) were the 62 green tip steel cores. Well over a foot at 100 yards.
 

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Buck Rogers said:
I've had the best luck with

winchester 40gr ballistic silvertips,
federal premium 40gr nosler tips,
and black hills 69 gr jhp, although there seems to be more fliers with these
Are you using these with the 556? These are very light bullets for the 1/7 twist.
 

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My 556 last week with the new Millet DMS on 4x at 100yds grouped 3 rounds .75". That's the best I have been able to shoot to date. They were 75gr handloads.
 

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rainman74 said:
Buck Rogers said:
I've had the best luck with

winchester 40gr ballistic silvertips,
federal premium 40gr nosler tips,
and black hills 69 gr jhp, although there seems to be more fliers with these
Are you using these with the 556? These are very light bullets for the 1/7 twist.
Yes I am, and yes they are. I was perplexed by it as well.

http://www.sigarms556.com/viewtopic.php ... ght=#42377

My rifle is also very accurate with 55gr fiocchi, and with 69gr Black Hills which I believe are loaded with sierra match kings.

I've been doing some thinking on this, and I think if a rifle can stabilize the lighter bullets, it may be very accurate with them not because it necessarily likes the lighter stuff better, but because those particular rounds are very high quality.

I haven't tried any heavier super expensive match grade rounds, but I'd be willing to be it would be just as accurate with those.

I've got an IOR 2.5-10X on it now, and recently shot a sub MOA group at 300 yards with the 55gr fiocchi. I don't think it can consistently do that (and I know I can't) so it was kind of just luck, but still, it shoots just about anything pretty well.
 

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I've been shooting the Fiocchi 55 grain V-MAX round with good success. My scope is a crappy Leapers 3-9x34, which is hard mounted on medium rings. At 50 yards I'm easily sub 1 MOA on a bench. At 100 yards it's mostly 3 MOA, although I've had some 2 MOA groups. My local Cabella's in Fort Worth put the Fiocchi on sale for $21.99 (50 rounds) and I bought 20 boxes. Through 800 rounds so far and not a single failure to anything!

I'm saving for a Leupold Mark 4 and plan to do my best with Hornady 75 grain BTHP, which I use for hunting hogs. I believe I will be a consistent sub 2 MOA (or less) with the better rounds and a much better scope.
 

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Zeus said:
My 556 last week with the new Millet DMS on 4x at 100yds grouped 3 rounds .75". That's the best I have been able to shoot to date. They were 75gr handloads.
...that's pretty good shooting Zeus !...and you've got me beat... :cry:

...scoped with a Leupold 4.5 - 14 while rested on a sandbag...the best i've been able to get using Black Hills 75 grain Match was ~1 MOA...a hair larger actually...using Federal Gold Medal Match 69 and 77 grain...i was able to get several 5 shot groups "slightly smaller" than 1 inch @ 100 yards in "both" my 556s...then i quit while i was ahead... :lol:

...using Federal XM193 i averaged 1 1/2 to 2 inches @ 100 yards on my 5 shot groups...using Bosian M855...somewhere around 2 inches or so...

...i'm very happy with the accuracy of my 556s...if the shooter does his part...some appear to be 1 MOA guns...or slightly better...can't ask for more than that...

...there's a fellow forum member on this board who shoots competitively...up to 1000 yards...he's an absolutely amazing marksman...he shot some .5 MOA groups @100 yards with his special handloads that he tailored specifically for his 556...
 
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