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Ussocom Adopts 6.5Mm Creedmoor Cartridge


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#1 Dawes

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Posted 10 May 2018 - 2016 PM

Given the glacial pace of new cartridge adoptions by the US military, this seems rather sudden:

 

http://soldiersystem...-adopts-6-5-cm/


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#2 shep854

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Posted 11 May 2018 - 0821 AM

Wiki: https://en.wikipedia...6.5mm_Creedmoor

It appears that this round could supplant 7.62x5451 for GPMG as well.  The smaller cartridge should also provide weight savings.


Edited by shep854, 12 May 2018 - 0843 AM.

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#3 Dawes

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Posted 11 May 2018 - 0838 AM

About the only negative I've heard about the 6.5mm is that bore life is considerably shortened when compared to 7.62mm. Presumably this wouldn't be an issue for the military.


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#4 Colin

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Posted 11 May 2018 - 0931 AM

As I recall, mostly throat erosion?


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#5 Dawes

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Posted 11 May 2018 - 1029 AM

I think so.

 

The US Army is also looking at the 6.8mm caliber as a SAW/infantry rifle cartridge. It's way too early to speculate, but will the 6.5mm start a trend similar to the 5.56mm wave begun in the 1960's/1970's?


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#6 shep854

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Posted 11 May 2018 - 1226 PM

Throat erosion has become a problem to be dealt with in the M855A1, so it should soon be a non-issue.
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#7 GregW

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Posted 11 May 2018 - 2245 PM

Wiki: https://en.wikipedia...6.5mm_Creedmoor
It appears that this round could supplant 7.62x54 for GPMG as well.  The smaller cartridge should also provide weight savings.


Surely you meant to say 7.62x51 right? The US Military does not use 7.62x54 in any regularly issued weapons.
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#8 shep854

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Posted 11 May 2018 - 2250 PM

Wiki: https://en.wikipedia...6.5mm_Creedmoor
It appears that this round could supplant 7.62x54 for GPMG as well.  The smaller cartridge should also provide weight savings.

Surely you meant to say 7.62x51 right? The US Military does not use 7.62x54 in any regularly issued weapons.
Good catch. Thanks! :)
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#9 Colin

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Posted 12 May 2018 - 0043 AM

 

Wiki: https://en.wikipedia...6.5mm_Creedmoor
It appears that this round could supplant 7.62x54 for GPMG as well.  The smaller cartridge should also provide weight savings.


Surely you meant to say 7.62x51 right? The US Military does not use 7.62x54 in any regularly issued weapons.

 

Russian trolls, promoting their ammo :)


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#10 shep854

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Posted 12 May 2018 - 0842 AM

 

 

Wiki: https://en.wikipedia...6.5mm_Creedmoor
It appears that this round could supplant 7.62x54 for GPMG as well.  The smaller cartridge should also provide weight savings.


Surely you meant to say 7.62x51 right? The US Military does not use 7.62x54 in any regularly issued weapons.

 

Russian trolls, promoting their ammo :)

 

HEY! I'm an AMERICAN troll!!! :P


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#11 Panzermann

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Posted 13 May 2018 - 0804 AM

 

 

 

Wiki: https://en.wikipedia...6.5mm_Creedmoor
It appears that this round could supplant 7.62x54 for GPMG as well.  The smaller cartridge should also provide weight savings.


Surely you meant to say 7.62x51 right? The US Military does not use 7.62x54 in any regularly issued weapons.

 

Russian trolls, promoting their ammo :)

 

HEY! I'm an AMERICAN troll!!! :P

 

 

russian hackers! :ninja:


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#12 shep854

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Posted 13 May 2018 - 1036 AM

Spaseba, gospodin. ;)
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#13 Ivanhoe

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Posted 15 September 2018 - 0841 AM

I've been ignoring the 6.5 Creedmoor simply because it seemed coated with too much hype. But of late I have been looking at ballistics & recoil data of rifle cartridges in the age-old "If you could have only 3 rifles" challenge. Nerdy, yes, but beats counting sheep. 

 

And it turns out the Creedmoor looks like a dandy choice for one's primary deer/antelope rifle. 130 grain bullet at 2800 fps, roughly 12 ft-lb of recoil and 11 fps of recoil velocity in a 7.0 lb rifle. Nice flat trajectory and plenty of impact speed out to 400 yards and beyond, with a streamlined bullet. 


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#14 Dawes

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Posted 15 September 2018 - 0851 AM

Evidently .260 Remington is quite similar in performance to 6.5 Creedmore but hasn't achieved the same level of popularity.


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#15 Simon Tan

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Posted 15 September 2018 - 1125 AM

6.5 Swede Short.


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#16 Ivanhoe

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Posted 15 September 2018 - 1622 PM

6.5 Swede Short.

 

Which is a Good Thing. Only problem with the Sweede is the lack of x57 length actions in the US of A, especially for those of the southpaw ilk. The 260 and Creedmoor fit in American short actions. 


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#17 TTK Ciar

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Posted 16 September 2018 - 1957 PM

My father likes 6mm BR for varminting wild hogs in East Texas, but his friend prefers 6.5 Creedmoor. Both reliably put down hogs (given decent shot placement). Sometimes they're shooting from close up, sometimes from 300-400 yards away.

If it's effective against 300lbs to 600lbs hogs at that distance, I'd expect it to do fine on 200lbs humans from much further away.

Edited by TTK Ciar, 16 September 2018 - 1958 PM.

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#18 JamesR

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Posted 24 May 2019 - 0253 AM

Here's an article talking about a prototype mk 48 mod 2 chambered in 6.5 creedmoor:

 

https://www.thedrive...ult-machine-gun

 

The article talks about how weight savings is the main idea behind the switch.. but I don't see much weight savings here.  Same bolt head, similar powder charge (~40ish grains), the creed they show uses a 140gr bullet.  Whats the standard 7.62 round used in machine guns these days.. 150-175gr?  At best we're only talking 35gr per round.  That's a savings of 1lb for 200 rounds. 

 

Performance wise, sure.. the 6.5 has a slight edge but is it enough to warrant adding another cartridge to the supply lines?

 

In addition to all this, as previously mentioned the 6.5s have shorter barrel life.  Your burning the same amount of powder through a smaller hole.  Maybe the chrome lining in the barrels will mitigate that somewhat but I still wouldnt be surprised if its half the barrel life.

 

I think going with something like a 6.5 grendel will get you better weight savings and improved performance over the 556 for a light weight machine gun. 


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#19 shep854

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Posted 24 May 2019 - 0754 AM

Again, not enough improvement for the expense...until there's a significant cartridge or materials breakthrough, it's all about 'paint and trim'--and who gets the money.


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#20 Panzermann

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Posted 26 May 2019 - 1608 PM

 

6.5 Swede Short.

 
Which is a Good Thing. Only problem with the Sweede is the lack of x57 length actions in the US of A, especially for those of the southpaw ilk. The 260 and Creedmoor fit in American short actions.

 

 

Hence Simon adding the "short" adjective. Balistically 6.5 creedmoor is a 6,5*55 in a shorter case. Of course you have a longer possible overall case length in a normal sized Mauser action than for .308 Winchester.



Meanwhile also the new 6.8*51 mm takes up steam in NGSAR trials with five participants:

  • W15QKN-18-9-1017 – AAI Corporation Textron Systems
  • W15QKN-18-9-1018 – FN America LLC. (Design 1)
  • W15QKN-18-9-1019 – FN America LLC. (Design 2)
  • W15QKN-18-9-1020 – General Dynamics-OTS Inc.
  • W15QKN-18-9-1021 – PCP Tactical, LLC
  • W15QKN-18-9-1022 – Sig Sauer Inc.

 

But that is a big US Army program, the Creedmoor is a SOCOM project.


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