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Old 09-22-2019, 08:45 PM
manimal87 manimal87 is offline
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Default Army's new 6.8 x 51 Sherwood round.



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Is that round a intermediate caliber or a full power round? Because some articles which mentioned that round wrote the "army searched for a new intermediate caliber"... But in case size and performance it's closer to a 7.62. So by classification... Is it full power or intermediate?
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Old 09-22-2019, 09:10 PM
AZ_HighCountry AZ_HighCountry is offline
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As far as I am concerned it is a full power round.
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Old 09-22-2019, 09:41 PM
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Does anyone know the powder capacity of the case and the chamber pressure?
Intermediate is around 30 grains.
Full power is more like 50 grains.
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Old 09-22-2019, 09:50 PM
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Google can be my friend.....sometimes:

http://soldiersystems.net/2019/06/19...in-consulting/

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Without pulling out a reloading manual, depending on the powder say 40-42 grains?

ETA - in my M1A with a Sierra 168 Match King, I've been running 44 grains of BL(C)-2. So maybe closer to 50 grains then if they are looking to drive it at 3000 fps?

Last edited by AZ_HighCountry; 09-22-2019 at 09:53 PM.. Reason: Added some personal loading info for .308
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Old 09-22-2019, 10:19 PM
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A .270-(3)08. I'd prefer a 7mm-08. Lots more choices of 7mm bullets than .270.
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Old 09-22-2019, 10:51 PM
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Meh, I'm waiting on 8.6 Creedmore...
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Old 09-23-2019, 07:44 AM
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Quote:
Originally Posted by charliemeyer007 View Post
A .270-(3)08. I'd prefer a 7mm-08. Lots more choices of 7mm bullets than .270.
Strangely, I have to agree with you. I know a number of guys shooting the 6.5-08 and 7mm-08. Both offer superior ballistics and bullet selections and both give Big Army exactly what it wants which is the desire to cling to the 7.62x51 mm case.
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Old 09-23-2019, 09:45 AM
manimal87 manimal87 is offline
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So it's a full power round?
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Old 09-23-2019, 10:03 AM
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Why on earth get hung up on full power or intermediate power?

It's a meaningless thing, with no real widely accepted definition.

What really matters is raw ammo weight, energy on target, and penetration.
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Old 09-23-2019, 11:02 AM
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Quote:
Originally Posted by AZ_HighCountry View Post
Google can be my friend.....sometimes:

http://soldiersystems.net/2019/06/19...in-consulting/

Photo of proposed round:



Without pulling out a reloading manual, depending on the powder say 40-42 grains?

ETA - in my M1A with a Sierra 168 Match King, I've been running 44 grains of BL(C)-2. So maybe closer to 50 grains then if they are looking to drive it at 3000 fps?
The article mentions greater internal case volume than 7.62mm and other .308 derived rounds. The scuttlebutt on performance is ~3500 fps with 125 gr bullets, close to .270 Weatherby Magnum performance. That's why Sig's design uses a steel case head. They went smaller and higher pressure to save weight and needed something stronger than brass to contain it.
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Old 09-23-2019, 12:03 PM
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Quote:
Originally Posted by masiaka View Post
The article mentions greater internal case volume than 7.62mm and other .308 derived rounds. The scuttlebutt on performance is ~3500 fps with 125 gr bullets, close to .270 Weatherby Magnum performance. That's why Sig's design uses a steel case head. They went smaller and higher pressure to save weight and needed something stronger than brass to contain it.
I have been handloading the 270 win since 1985, and I cant get close to the Army's velocity targets with standard reloading powders, and a 24" barrel.

I suspect the use proprietary powders and packing methods (like Hornaday), a larger case, and push higher pressures.
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Old 09-23-2019, 05:54 PM
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Quote:
Originally Posted by ajole View Post
Why on earth get hung up on full power or intermediate power?

It's a meaningless thing, with no real widely accepted definition.

What really matters is raw ammo weight, energy on target, and penetration.
Over at Big Army, there are some aspiring individuals in PEO Soldier who dream of their next promotion and this is their way of achieving it. In the meantime, M4s and M27s will continue to be the mainstay infantry weapons for sometime to come.
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Old 09-26-2019, 05:16 PM
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They have reinvented the 270 with a cartridge that's no better than 100 others.
It probably only cost them a few million.
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Old 09-27-2019, 06:50 AM
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Exactly right. I agree with the first comment in the posted article with "I think they misunderstood the requirement"
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Old 09-27-2019, 08:56 AM
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Whatever 6.Xmm cartridge they finally end up producing and using will be a blessing. Let's finally get over this 556 era.
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Old 10-03-2019, 07:44 AM
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If the Army makes any decision at all, my bet is on the 6.8mm CT from Textron at this point.
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Old 10-03-2019, 11:03 AM
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Quote:
Originally Posted by Vodka Wizard View Post
Whatever 6.Xmm cartridge they finally end up producing and using will be a blessing. Let's finally get over this 556 era.
A 12lb+ lb loaded AR10 is not going to replace 5.56.

This is for punching holes through advanced plates at long range. It's going to suck for a lot of other missions. M4's and MK18's are going to be continuing to kill bad guys for a long time. Likely until another similar size cartridge or 5.56 bullet replaces it.
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Old 10-03-2019, 08:34 PM
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Quote:
Originally Posted by HappyinID View Post
A 12lb+ lb loaded AR10 is not going to replace 5.56.

This is for punching holes through advanced plates at long range. It's going to suck for a lot of other missions. M4's and MK18's are going to be continuing to kill bad guys for a long time. Likely until another similar size cartridge or 5.56 bullet replaces it.
Just go with a 25WSSM and call it a day but then you are burning barrels faster. Just go with a 6.5 Grendel and call it a day...nope, not legendary enough.
They know the better mousetrap has already been invented but that pesky capitalism keeps getting in the way.
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Old 10-22-2019, 01:01 AM
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That rim looks to be rebated, perhaps a 6.8x.284 Win?
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Old 10-22-2019, 01:52 AM
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How much of our money is the Army going to spend trying to re-invent the wheel?
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