Any 600 yard groupings shot by an AR15 6MM ARC to share?

[Canuckienns]

Show us you long range groupings shot with an AR15 6MM ARC, and what load were you using.

 

[Park ranger]

 

[Park ranger]

^ was a 6 ARC with a 22” Saturn barrel. 109 Berger hybrid with virgin starline case, 450 mag primer and 28.7 grains of AA2520 thrown from a powder measure. It was shot with a March Scope at 16x at Reade Range in AR tactical class.

199-5x. Shot 14 was the low 9.

1000 yards.

 

[Cfshooter]

^ was a 6 ARC with a 22” Saturn barrel. 109 Berger hybrid with virgin starline case, 450 mag primer and 28.7 grains of AA2520 thrown from a powder measure. It was shot with a March Scope at 16x at Reade Range in AR tactical class.

199-5x. Shot 14 was the low 9.

1000 yards.

Very nice, good shooting. Was that with the 2moa 10 ring?

 

[Park ranger]

Yes, sling target so 10 ring is 2 moa

 

[Canuckienns]

Outstanding Park Ranger.

 

[Raptor]

I must have deleted my 600yd one, but this is 300yds with 87 Bergers out of my 18" Proof bbl AR. I was getting 3 to 4" groups at 600 with mine on a decent day....

 

[jmhmerica]

Have any of y'all run factory 6ARC through any of your gas guns to see what results you get? I don't expect results much under 1moa, especially with Hornady loads, but I have tried a Proof carbon 18", a Boss Barrels 12", a Ballistic Advantage 18", and a Quarter Minute Arms 18" and have gotten absolutely atrocious results at 100M. Ironically the 12" boss barrel consistently groups better than any other barrel at roughly 1.2in. The Quarter Minute grouped sub-MOA if you don't count the single flier within 5 rounds that took every group up closer to 1.6in. the Proof and BA barrels were both well over 1.5" at 100M.

I have tried both Hornady Black (18" Barrel 20rnds- AV: 2599, ExtSp: 43.6, StdDev: 13.2) and Match (18" Barrel 20 rnds- AV: 2572, ExtSp: 29.7, StdDev: 8.1) and while Match is marginally better, it's not great.

Anyone have suggestions on things to look for in the gun that could be causing the problem? Throughout testing I was using three separate upper assemblies with matching bolts, matching gas blocks, and each setup required relatively similar pressure to close on the go gauge.

 

[David Milisock]

Hornady Black, 105 grain shoots sub minute at 100 yards in my Ballistic Advantage 16" heavy stainless barreled Aero Precision M4E. I've shot steel out past 600 and made easy hits. As this is a general purpose/hunting rifle I haven't bothered with precision groups out far.

 

[Jr solocam]

Hornady Black 105's with an APF 18" bone stock, Razor LHT and Diligent suppresser. Ave 2593 fps and 1.375" @ 200 yds Haven't tried any further yet.

 

[Jr solocam]

I have a 10" gong set up at 625, I should give it a shot this weekend. I would also like to try the 109 ELDM.....

 

[JavmanSTX]

Have any of y'all run factory 6ARC through any of your gas guns to see what results you get? I don't expect results much under 1moa, especially with Hornady loads, but I have tried a Proof carbon 18", a Boss Barrels 12", a Ballistic Advantage 18", and a Quarter Minute Arms 18" and have gotten absolutely atrocious results at 100M. Ironically the 12" boss barrel consistently groups better than any other barrel at roughly 1.2in. The Quarter Minute grouped sub-MOA if you don't count the single flier within 5 rounds that took every group up closer to 1.6in. the Proof and BA barrels were both well over 1.5" at 100M.

I have tried both Hornady Black (18" Barrel 20rnds- AV: 2599, ExtSp: 43.6, StdDev: 13.2) and Match (18" Barrel 20 rnds- AV: 2572, ExtSp: 29.7, StdDev: 8.1) and while Match is marginally better, it's not great.

Anyone have suggestions on things to look for in the gun that could be causing the problem? Throughout testing I was using three separate upper assemblies with matching bolts, matching gas blocks, and each setup required relatively similar pressure to close on the go gauge.

Shooting factory Hornady 108s out of a "24 Eabco barrel and getting one ragged hole groups. Only shot a few groups last weekend as it was to dang hot in S Tx. 103s shot so-so!

 

[DLT]

^ was a 6 ARC with a 22” Saturn barrel. 109 Berger hybrid with virgin starline case, 450 mag primer and 28.7 grains of AA2520 thrown from a powder measure. It was shot with a March Scope at 16x at Reade Range in AR tactical class.

199-5x. Shot 14 was the low 9.

1000 yards.

Shewwwwww. What’s your load development method ??

 

[Park ranger]

Shewwwwww. What’s your load development method ??

Not really much. I tested a few bullets to look for the best elevation at 600 yards. Then chronograph to get the speed where I wanted. Honestly, I spent more time working on my position and set up than I did fooling with seating depth and charge weight. That group was thrown from a RCBS powder measure.