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DPMS 6.5 Creedmoor Or 260 Remington Upper?

hilbillee

Sergeant
Full Member
Minuteman
Jul 21, 2008
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Franklin, NC
I am about to buy an upper for a CMMG 308 lower that I built. I have went back thru the threads here reading the pros & cons of each caliber and comparing each caliber's performance, etc. I was almost ready to buy a 260 upper but have noticed that very few factory rifles are chambered for it now. It seems to be fading away due to lack of interest in the caliber. And the 6.5 Creedmoor brass seems to have dropped in price from the last time I checked. I know that Rob01 did use it in competitions, as did some others. I guess what I am trying to ask is would I be better off to just go with the Creedmoor over the 260 due to the fading away of the 260?
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

From what I understand to use the longer bullets in the .260 rem you end up seating them real deep to clear magazine constraints and the 6.5 creedmore is better suited for an AR.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

I have two 260s, one throated long 2.960 with Berger 140 for single feeding and one short throated for 2.820 with the same bullet. I see no real difference in velocity or accuracy between the two lengths. YMMV. I have seen impressive range reports on the Creedmoor and will probably have a barrel for my T2K eventually but that will not cause me to sell the 260s I have.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pinzmann</div><div class="ubbcode-body">How many factory rifles are chambered for 6.5CM?</div></div>

DPMS and Ruger both make factory rifles but any short action .473 bolt face can have a barrel thrown on pretty easy.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lizzardking308</div><div class="ubbcode-body">+1 for 6.5 CM. </div></div>

+2 for the 6.5 Creedmoor. I will be swapping the barrel on my .308 Rem for the 6.5 hopefully soon.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

The 260rem has no personality as only a .308 neck variant.
In a auto the CM has more shine in capability with length.

I don't see either as something well suited as a continuing factory variant for rifles and ammo.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

I have read many of the internet articles on 260 vs Creedmoor and I don't understand difference between the two. Is there really much a difference between the two.
As I am a picture kinda guy, is there a ballistic chart/graph showing them shot out of same length barrels? Then maybe I would under stand better.
A good example with be the DPMS 260 vs Creedmoor, they have the same length barrel and same everything except chamber.
How how do they differ?
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

I got my 6.5 Creedmoor upper at last. All I have got to do is basically function test it as I only have 50 yds to shoot here at home. With the Hornady 120 gr. Amax it is basically 1 ragged hole. I know at 50 yds. that doesn't mean anything. The only problem I am having with it is that when the rifle cycles after firing & ejecting the spent case it will not pick up the next round in the mag. It feeds everytime when I pull the charging handle though. Any suggestions as to what causes this or what I can do to fix it. The upper is on a CMMG lower and I am using DPMS mags.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hilbillee</div><div class="ubbcode-body">The only problem I am having with it is that when the rifle cycles after firing & ejecting the spent case it will not pick up the next round in the mag. It feeds everytime when I pull the charging handle though. Any suggestions as to what causes this or what I can do to fix it.</div></div>

Single feed / load the rifle by hand and leave an empty mag inserted. See if the bolt carrier group locks back after firing. If it doesnt lock back I'd look at a slightly weeker spring or it's a gas system issue.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

I tried the single feed/load by hand and inserted an empty magazine. Did this twice and the bolt failed to lock back either time. I checked the gas tube for obstruction, there were none. I also checked the gas hole in the barrel, no obstructions there either. I am thinking the buffer spring needs to ba a little weaker, if I can find one that is. I also sent DPMS an e-mail asking them about the problem. Hopefully they will respond Monday.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hilbillee</div><div class="ubbcode-body">I tried the single feed/load by hand and inserted an empty magazine. Did this twice and the bolt failed to lock back either time. I checked the gas tube for obstruction, there were none. I also checked the gas hole in the barrel, no obstructions there either. I am thinking the buffer spring needs to ba a little weaker, if I can find one that is. I also sent DPMS an e-mail asking them about the problem. Hopefully they will respond Monday. </div></div>

Either it needs more gas or less spring. The bolt carrier assembly not locking back is why it's not feeding. The bolt isnt getting behind the case head to push it out of the magazine.

Now you have a direction to go in.

EDIT: I went back to the first post and see it's not a DPMS Lower. Will the bolt lock back via the charging handle?
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

Yes, it will lock back via the charging handle. But I did notice when I tried it that it is almost at the limit of travel. The bolt might go back another 1/4 of an inch. And I tried it on both the CMMG lower and the DPMS lower.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hilbillee</div><div class="ubbcode-body">I went ahead and ordered the 6.5 Creedmoor upper. </div></div>

Mind sharing where you ordered it?
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hilbillee</div><div class="ubbcode-body">I tried the single feed/load by hand and inserted an empty magazine. Did this twice and the bolt failed to lock back either time. I checked the gas tube for obstruction, there were none. I also checked the gas hole in the barrel, no obstructions there either. I am thinking the buffer spring needs to ba a little weaker, if I can find one that is. I also sent DPMS an e-mail asking them about the problem. Hopefully they will respond Monday. </div></div>

I recently found a fix with one of my uppers with the same problem you have but less pronounced symptoms.I beveled the gas port slightly on the barrel with a center drill and drilled the gas blocks' hole out one drill bit size bigger.Works perfect now.

Don't they make adjustable gas blocks for large frame DPMS?

Steve
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

SPC Sherri Gallagher National Long Range Champion for 2009. Round may lack personality, but who cares when you are the winner! Sherri was shooting a 260 Remington! If it ain't broke, don't fix it.

No one mentioned the brass is available in 308 or 243 and of course the standard 260 from Remington. My opinion, this round isn't going anywhere anytime soon.

My .02$
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hilbillee</div><div class="ubbcode-body">Yes, it will lock back via the charging handle. But I did notice when I tried it that it is almost at the limit of travel. The bolt might go back another 1/4 of an inch. And I tried it on both the CMMG lower and the DPMS lower. </div></div>

As already mentioned I would take a weight or two out of the buffer to see if it will lock back before you do anything else.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

I talked w/ DPMS this morning. They advised to send it back and let them check it out. They said the gas ports probably needed opening up a little. So it's on the way back to them by USPS Priority mail. Hopefully they will gat it running right.
 
Re: DPMS 6.5 Creedmoor Or 260 Remington Upper?

Got the 6.5 Creedmoor upper back from DPMS this afternoon by UPS. According to the paperwork they polished the gas system and functioned tested it with no malfunctions. I figure they opened up the gas port in the barrel. Now to get a day that it isn't raining to test it myself. While the upper was gone I picked up 4 of the Magpul 7.62 mags to try in it.