6.5 creedmoor ar10

[farmerboy78]

Hey guys, I'm about to do my 1st ar10 build and I'm looking for some suggestions if any are needed. I'm starting with a cmmg mk3 .308 carbine, rainier arms 22" 6.5 creedmoor barrel, Luth ar mba3 stock, Hogue grip. My barrel gas system will be rifle length +2", and I'm curious if I'll need to change my buffer, spring, or even a switch gas block to shoot suppressed or not? Not sure what trigger is in it or if it will need replaced? What factory ammo do these barrels tend to like? Any input will be a great help. Thanks in advance!

 

[Varminterror]

Get a detent adjustable gas block and a vented charging handle and you'll be fine switching between suppressed and free muzzle. Buffer and carrier weight really dictate how long your bolt stays locked, heavier slows down the recoil impulse, but also makes the rifle nicer to your brass, while lighter lets it cycle faster and offers a lighter overall rifle, but can also beat up brass - but any of them work with any gas length.

 

[farmerboy78]

Get a detent adjustable gas block and a vented charging handle and you'll be fine switching between suppressed and free muzzle. Buffer and carrier weight really dictate how long your bolt stays locked, heavier slows down the recoil impulse, but also makes the rifle nicer to your brass, while lighter lets it cycle faster and offers a lighter overall rifle, but can also beat up brass - but any of them work with any gas length.

Do you have any suggestions to the gas block and buffer weight? .936" for the block.

 

[bangswitch]

You may want to stick with a heavier buffer to slow the action. There can be feeding issues with the Creedmoor's more sharply tapered case neck.. I've thought a lot about building an AR10 Creedmoor or buying a bolt action, like Ruger's Precision Rifle; I've decided on the bolt gun, but maybe not the Ruger. Consider a .260 Rem for a semiauto, the case neck taper is milder, the performance is pretty much on par with the Creedmoor.

 

[salt&battery]

You may want to stick with a heavier buffer to slow the action. There can be feeding issues with the Creedmoor's more sharply tapered case neck.. I've thought a lot about building an AR10 Creedmoor or buying a bolt action, like Ruger's Precision Rifle; I've decided on the bolt gun, but maybe not the Ruger. Consider a .260 Rem for a semiauto, the case neck taper is milder, the performance is pretty much on par with the Creedmoor.

how can that be? the creed is the best designed round in the history of the world. how can the useless 260 be better?

 

[farmerboy78]

Well i have had a bolt creedmoor and wanted a semi... hope it all does fine once its together.

 

[Gtscotty]

Most of the accounts I've read of 6.5 Creed AR-10s jamming had to do with the narrow points and secant Ogive bullet shapes of the popular high bc bullets causing the cartridge too stay lower during feeding and the tip to hit an un-chamfered portion of the barrel face. There are reports of .260's doing the same with the same bullets, seems to be an issue with the barrel face cuts and bullets ( heavy Berger's and the like) being used. That said, there appear to be plenty of 6.5 Creed AR's out there that work just fine. I shot a match where a guy was shooting an AR in 6.5, and it ran like a top with ELDs, quite accurate too.

 

[mshootnit]

If somebody made a free floated 18.5" 6.5 Creed AR coming in at 7.7 lbs or less I might be in.

 

[farmerboy78]

Well, I picked up this carbine today and installed the Hogue grip and the Louth mba-3 stock... I'm awaiting my barrel and I'm trying to figure out what gas block I want to put on the barrel. I am looking at 3 different ones; the paladin machine, the white oak, and the superlative... someone help me out here

 

[Offfhand]

Best 6.5 choice for an AR is .260 Rem. The shape of CR case is persistent cause of feeding blockages in ARs whereas the .260 glides out of magazine into chamber slick and positive. Plus .260 being better and smarter caliber anyway. I've worked with and owned both, so this is not a second hand website opinion.

 

[rayatphonix]

First Creedmoor I bought was a DPMS. I don't recall ever having a feed issue.

I'm a 6.5 nut and have both the CM and 260. The CM vs 260 came up in another thread and none of the 260 proponents could tell me why it's a better choice. I can buy the "easier to feed", but can't see any other advantages on a stock rifle. Offhand, why is it a better choice?

I have both in bolt action guns and would be hard pressed to tell the difference, at least at the distances I typically shoot.

 

[salt&battery]

First Creedmoor I bought was a DPMS. I don't recall ever having a feed issue.

I'm a 6.5 nut and have both the CM and 260. The CM vs 260 came up in another thread and none of the 260 proponents could tell me why it's a better choice. I can buy the "easier to feed", but can't see any other advantages on a stock rifle. Offhand, why is it a better choice?

I have both in bolt action guns and would be hard pressed to tell the difference, at least at the distances I typically shoot.

I think offhand might mean the 260 is a better choice then the 308 in the AR or other rifles

 

[farmerboy78]

Guys please don't turn this into a 6.5 cm vs 260... I've ran a bolt creedmoor and wanted a gassed one now. ..so here I am with questions.

 

[aubie515]

Reason why I went with 6.5CM in an AR10 is due to the fact that if you reload you can load the 6.5CM longer in the DPMS patterned mags compared to 260.

With a +2 gas system, I don't think it will matter about the buffer weight.

I'm building an ultra light AR10 in 6.5CM...I didn't order my buffer yet, but it should be a little over 6lbs. I didn't go with the +2 gas system due to weight on those barrels. I went with a Christensen Arms carbon fiber barrel.

 

[farmerboy78]

Well i received my barrel yesterday and learned a valuable lesson. ALWAYS, always get a matching bolt. The bolt wouldn't close on a go gauge. Sending it back to rainier to get a solution.

 

[Gtscotty]

Good thing you checked, it was supposed to come fully chambered, not short chambered right?

 

[farmerboy78]

Yes, it was supposed to be fully chambered, hopefully it's not my bolt... they said the chamber will be checked out and we'll go from there

 

[Casefull]

Well i received my barrel yesterday and learned a valuable lesson. ALWAYS, always get a matching bolt. The bolt wouldn't close on a go gauge. Sending it back to rainier to get a solution.

 

[Varminterror]

The whole "6.5 creed's don't feed in AR-10's" deal is a gross exaggeration. If hiccups were common for AR-10's in 6.5 creed, we'd hear a lot more about it, and reputable companies would stop making them. I sure haven't had problems with mine.

Sucks to hear the headspace issue with the bolt/extension combo - doesn't happen often, but it does happen. Did you ask the OEM's the headspace dims they use? Did you check the bolt depth?

 

[salt&battery]

The whole "6.5 creed's don't feed in AR-10's" deal is a gross exaggeration. If hiccups were common for AR-10's in 6.5 creed, we'd hear a lot more about it, and reputable companies would stop making them. I sure haven't had problems with mine.

Sucks to hear the headspace issue with the bolt/extension combo - doesn't happen often, but it does happen. Did you ask the OEM's the headspace dims they use? Did you check the bolt depth?

there must be some sort of problem in the AR 10 with the creed round even the bolt does not fit

 

[farmerboy78]

Lol, hopefully it's as easy as a bolt issue because that can be resolved very easy

 

[aubie515]

The real issue with AR10 is that there is no standard for the AR10 as there is with the mil spec AR15. You have Armalite AR10 on one side and SR25/DPMS pattern on the other side. Most seem to be using SR25/DPMS as there are more mags available for that pattern.

 

[coloradokevin]

how can that be? the creed is the best designed round in the history of the world. how can the useless 260 be better?

I almost spit water on my screen reading that comment... it does seem like that's the thinking in some camps these days! I got my .260 Remington when 6.5 Creedmoor was still a bit of a new kid on the block. Everyone wanted .260 Rem then, and now everyone wants the 6.5 Creedmoor, or one of the various 6mm offerings. But, the .260 Remington doesn't really realize that it was unfriended by some people, and still shoots great for me!

 

[salt&battery]

I almost spit water on my screen reading that comment... it does seem like that's the thinking in some camps these days! I got my .260 Remington when 6.5 Creedmoor was still a bit of a new kid on the block. Everyone wanted .260 Rem then, and now everyone wants the 6.5 Creedmoor, or one of the various 6mm offerings. But, the .260 Remington doesn't really realize that it was unfriended by some people, and still shoots great for me!

some guys on the shooting circuit are like women who throw out what they have then run out and buy the latest shoes dress eyeliner etc lol. the creed has nothing on the 260 except internet babble

 

[Gtscotty]

Guys please don't turn this into a 6.5 cm vs 260... I've ran a bolt creedmoor and wanted a gassed one now. ..so here I am with questions.

Why don't you respect the OP's wishes instead of trying to stir the pot. If you want a .260, go buy one, that's not what this thread is about.