6mm ARC Velocities

[wabash503]

Yes

That's insane. I had 2925 with 31.0 gr of LVR, but the primers were all flat and some of them cratered... On magnum SRPs

 

[wabash503]

He was getting heavy bolt lift and flattened primers, but he still got 2800+ out of that 20" barrel without pressure signs. Did you catch what action / barrel he was using? I've seen Gavin on ultimate reloader push 308 and 7 SWC to magnum speeds, but he purpose built the chamber and selected the action to be able to handle the increased pressure... And that was only for a test.

 

[liv3mind]

He was getting heavy bolt lift and flattened primers, but he still got 2800+ out of that 20" barrel without pressure signs. Did you catch what action / barrel he was using? I've seen Gavin on ultimate reloader push 308 and 7 SWC to magnum speeds, but he purpose built the chamber and selected the action to be able to handle the increased pressure... And that was only for a test.

I didn't catch it no, he posted in a comment that the build is in the description but I'm not seeing it. I watched that UR vid, pretty interesting stuff.

 

[passinggas33]

Factory Howa Mini 20” barrel, shooting factory ELDM ammo, I’m getting 2620 consistently. Actually been surprised by how consistent the factory ammo has been velocity wise.

 

[KyleR1985]

“A little smear” haha. Everything is fine!

 

[OneShot]

Factory Howa Mini 20” barrel, shooting factory ELDM ammo, I’m getting 2620 consistently. Actually been surprised by how consistent the factory ammo has been velocity wise.

I have a 20” that is close to that also. Seen one lot averaging 2575 and my last lot was averaging 2620.

 

[TX_Diver]

Factory Howa Mini 20” barrel, shooting factory ELDM ammo, I’m getting 2620 consistently. Actually been surprised by how consistent the factory ammo has been velocity wise.

I am averaging about 2650 with factory 108s from an 18” preferred barrel.

 

[DoubleDown]

AR 18” Odin barrel 2525 factory Hornady 103 ELD-X

 

[Tobe_B]

My howa mini 22” is getting 2620 with factory 108s.

My 14.5” AR is at 2502 with 95gr tmk at 29gr of cfe 223. Which is right under book max. Personally, that extra 10 inches of barrel isn’t worth the extra fps to gain that distance for game animals. I feel like in most cases I could close that 300 yard gap down to get within my velocity window for a shot. rather than setting up for the longer distance.

 

[General RE LEE]

My howa mini 22” is getting 2620 with factory 108s.

My 14.5” AR is at 2502 with 95gr tmk at 29gr of cfe 223. Which is right under book max. Personally, that extra 10 inches of barrel isn’t worth the extra fps to gain that distance for game animals. I feel like in most cases I could close that 300 yard gap down to get within my velocity window for a shot. rather than setting up for the longer distance.

How much does a 14.5” AR weigh? I’m considering a 14.5” upper for fun.

 

[KyleR1985]

My howa mini 22” is getting 2620 with factory 108s.

My 14.5” AR is at 2502 with 95gr tmk at 29gr of cfe 223. Which is right under book max. Personally, that extra 10 inches of barrel isn’t worth the extra fps to gain that distance for game animals. I feel like in most cases I could close that 300 yard gap down to get within my velocity window for a shot. rather than setting up for the longer distance.

Max load lever in 16” gasser was 2700fps with 95tmk.

.8gr below max was 2500fps in 12” barrel.

I think if you’re SBR’ing a 6ARC, 12” barrel appears to be a sweet spot

 

[KyleR1985]

How much does a 14.5” AR weigh? I’m considering a 14.5” upper for fun.

The problem with the gasser barrels, besides the BCA 556 pencil barrel, is they’re heavy.

My 12” weighs 1.75lbs.

Good news is it would be easy to chuck in a lathe and turn down

Someone could make a mint profiling .223 and .243 cal AR barrels as thin as possible.


Edit: my barrel is nitrided. Turning won’t be fun.

 

[Bigwilly556]

How much does a 14.5” AR weigh? I’m considering a 14.5” upper for fun.

12.5" Noveske DDF SBR 95 Berger classic hunters @2480 in cooler temps. Weight #9 4oz as pictured with no mag and a CAT Noah Ti. 14.7" craddock RTR (middle) spirl fluted same lower no optic or mag with a Silencerco Scythe Ti #7 1oz.

 

[Alarka]

Didn’t see a threads specifically for 6 ARC, so figured I’d get this going for people to share velocities and barrel lengths on their 6 ARC. This should help folks get a baseline of what to expect when they are considering building one.

16” Proof stainless AR barrel, suppressor, factory ammo. Accuracy was about equal between the factory 108 eldm and factory 103 eldx. These are the first shots down the barrel so I am expecting them to speed up and settle in a little.

Seekins 20” Proof with 108 ELDM Suppressed.

 

[Tobe_B]

How much does a 14.5” AR weigh? I’m considering a 14.5” upper for fun.

Mine weighs 10lbs 6 oz loaded and suppressed. Definitely my favorite rifle in the safe, even if a little heavier than most. I’m not one to worry as much about my hunting rifle weight as I’m not a backpack style hunter. If I’m going in to the wilderness and going far, I’m going horseback.

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[General RE LEE]

Mine weighs 10lbs 6 oz loaded and suppressed. Definitely my favorite rifle in the safe, even if a little heavier than most. I’m not one to worry as much about my hunting rifle weight as I’m not a backpack style hunter. If I’m going in to the wilderness and going far, I’m going horseback.

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Did you build that or just purchase a complete upper?

 

[Tobe_B]

Assembled it. I thought the barrel here, and a friend helped with the rest.


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