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Originally Posted by Triggernosis
Personally, I'd rather have 100 rounds of a cartridge that will lay an enemy combatant on his ass than 400 rounds of ammo that I've got to shoot him 4 times to put down, all the while hoping he doesn't clack off a hidden IED while he's flopping around.
5.56 had no business as a war cartridge.

The mountain of dead the 5.56 has piled up obviously has no effect on your opinion. Second anytime I can have 280 to 320 rounds over 140 I will take the formwer.


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Originally Posted by drop_point
Originally Posted by Tarquin
The Sig steel base cartridge is ingenious since it allows for 80,000 PSi, but why not employ that concept in a Grendel-based cartridge (.22 ARC for example with an 80 grain pill or 6mm ARC with a 105 grain pill? You could motivate it at +3000 fps from a 16.5" barrel and still use the M4. With the 6mm ARC, 800-yard performance would be within an eyelash of the .227 Sig Fury but with much lighter ammo and rifle.

How many rounds of barrel life you think an 80k PSI 6mm will go?

How many for a .277 at 80K psi. And just how good are the suppressors? How many rounds will they last? How loud will the rifles be without a suppressor? Seems a miserable choice, going deaf, running out of ammo.


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What is the militaries fascination with .277 when there is .264 and .284? Stick a large rifle primers in a 6x47 lapua and make a 130g boat tail with a g1 bc of better than .550. The lapua round is proven accurate and a few extra bc points wouldn't hurt. Too many of our old military guys listen to too many of their uncles 270 win deer hunting stories. The swedes had the bore right over 100 years ago. I like the 6mm gt too. A 110g 6mm bullet can have a bc over .6 and weighs less.

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Originally Posted by tdoyka
in case no one mentioned the 6.8x51 is designed to go thru level 4 body armor and plates at 500 meters, something the 5.56 is lacking. the Army 6.8 projectiles, are kept under wraps and not commercially available, is special materials rounds.

body armor is something to consider.

500 yards is pretty ambitious anyway for most.


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Originally Posted by Sako76
Maybe I missed it, how many rounds can the standard issue magazine hold?
20 just like the M14.


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Originally Posted by horse1
Originally Posted by JohnBurns
The 5.56mm has the longest and best run as a "war cartridge" the world has ever seen.

Seems like the 7.62x39 ought to be at least mentioned in that breath as well.

No illusions/delusions about experience here, I didn't/haven't and am now to old to serve in any military capacity. The only version of "combat" I have experience with is trying to keep other boats off my marker bouy when catching is good. The last "war" video game I played extensively was on an Atari driving pixilated tanks.

Does it make any sense to have these available for the best few shooters in a squad, maybe for those who set a perimeter, or, as an option if traveling through open country? Does it have to be "All or nothing?"

Seems reasonable to use the new rifle with designated riflemen.


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Originally Posted by rickt300
Originally Posted by tdoyka
in case no one mentioned the 6.8x51 is designed to go thru level 4 body armor and plates at 500 meters, something the 5.56 is lacking. the Army 6.8 projectiles, are kept under wraps and not commercially available, is special materials rounds.

body armor is something to consider.

500 yards is pretty ambitious anyway for most.


can a 5.56 penetrate Level 4 body armor at 50 meters? 100 meters? 150 meters? 200 meters? i don't know, but i betcha the Army does know.

the 5.56 was a good round to kill unarmored opponents. today in this day and age, China supplies level 4 body armor to their troops. it's kinda hard to kill the Chinese troops having level 4 body armor using the 5.56.


338 Lapua with polymer cases is less weight than a 7.62. i don't know if the Lapua is coming out or shelved.

https://www.youtube.com/watch?v=bVgyOHB5D5M&t=132s&ab_channel=Task%26Purpose

Last edited by tdoyka; 04/02/24.

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just for your own info

https://www.armytimes.com/news/your...new-rifle-machine-gun-and-optic-in-2024/

Army to field new rifle, machine gun and optic in 2024
By Todd South
Dec 20, 2023


The Army’s newest rifle and automatic rifle are already in the hands of soldiers for testing and will officially field to its first unit in 2024.

The service delivered the Next Generation Squad Weapon rifle and automatic rifle, known as the XM7 and XM250, respectively, along with its advanced optic, the XM157 fire control, to a platoon in the 101st Airborne Division at Fort Campbell, Kentucky in late September.

That platoon, along with a squad from the 75th Ranger Regiment, conducted user tests over the subsequent months as the Army ramped up for full fielding to a not yet identified unit in the 101st by the second quarter of fiscal year 2024, officials told Army Times.

The XM7 will replace the M4 for close combat units such as infantry, scouts, combat engineers and special operations forces. The XM250 will replace the M249 Squad Automatic Weapon for the same units.

The weapons and optics will drop the “X” in their names once fielded.

Non-close combat forces will continue to carry the M4 and M249 for the foreseeable future.

The legacy M4 and M249 fire the 5.56mm round while the XM7 and XM250 fire the recently developed 6.8mm cartridge.

The Army began development of the “intermediate caliber” to better defeat enemy body armor and increase both accuracy and lethality at longer ranges. That effort began in earnest following the 2017 Small Arms Ammunition Configuration Study, which identified firepower and range gaps in small arms across the Army.

The Marine Corps has actively participated in multiple testing and evaluation sessions with the Army, provided feedback and is “monitoring” the Army’s development and fielding of the weapons systems.

The heavier round provides better penetration and outperforms the 7.62mm round used in the M240 machine gun system, typically found at the platoon level.

The increased energy of the round also allows shooters to penetrate barriers that deflected 5.56mm rounds, as demonstrated in a live fire during which an Army Times reporter participated in September at Aberdeen Proving Ground, Maryland.

Multiple XM250 6.8mm rounds drilled holes through cinder blocks and struck a human silhouette target while only a single 5.56mm round managed to damage, but not fully pass through the cinder blocks.

“That’s turning cover into concealment,” Lt. Col. Micah Rue, product manager for soldier weapons at Program Executive Office-Soldier, said at the time.

The current 10-year contract for the Sig Sauer weapons, builder of both systems, has a ceiling value of $4.5 billion, and the Vortex Optics/Sheltered Wings XM157 fire control cost ceiling is set at $2.7 billion.

The fire control allows for computer-aided ballistics, matching the round and weapon with the optic for better accuracy. The shooter can aim at the target, push a button on the weapon or optic and it will automatically adjust for distance and bullet drop, allowing the user to adjust fire rapidly.

The fire control has preprogrammed ballistics information and can be fit to nearly any small arms weapon system in the Army’s inventory.


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Originally Posted by Phillip_Nesmith
Originally Posted by Jeffrey
I wonder what 80k psi is like when your buddy corks a few off next to your ear.

The standard 50-60k sucks pretty hard.
Weren't they going to be supplied with suppressors?

Sure. Until the suppressor lost. Or not installed properly or damaged jumping out of a vehicle or slammed against a doorframe just enough to cause a baffle strike.

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Originally Posted by Sako76
Maybe I missed it, how many rounds can the standard issue magazine hold?

20.

The 6.8X51mm is the same case size as the 7.62X51mm (.308). It's a .270/08 running at very high pressure.

Originally Posted by horse1
Originally Posted by JohnBurns
The 5.56mm has the longest and best run as a "war cartridge" the world has ever seen.

Seems like the 7.62x39 ought to be at least mentioned in that breath as well.

No illusions/delusions about experience here, I didn't/haven't and am now to old to serve in any military capacity. The only version of "combat" I have experience with is trying to keep other boats off my marker bouy when catching is good. The last "war" video game I played extensively was on an Atari driving pixilated tanks.

Does it make any sense to have these available for the best few shooters in a squad, maybe for those who set a perimeter, or, as an option if traveling through open country? Does it have to be "All or nothing?"

Yeah the 7.62X39mm is a contender but has not been the frontline issue round for the Commies for decades. The Orcs went to a 22 cal version and the ChiComs use the 5.8X42mm. The trend to the smaller caliber rounds is pretty much universal for those with large armies.

The M7 is going to be a failure for general infantry issue and the current guns are not accurate enough for DMR duty.


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Originally Posted by rickt300
Originally Posted by Triggernosis
Personally, I'd rather have 100 rounds of a cartridge that will lay an enemy combatant on his ass than 400 rounds of ammo that I've got to shoot him 4 times to put down, all the while hoping he doesn't clack off a hidden IED while he's flopping around.
5.56 had no business as a war cartridge.

The mountain of dead the 5.56 has piled up obviously has no effect on your opinion. Second anytime I can have 280 to 320 rounds over 140 I will take the formwer.
Well then, perhaps you should tote you some .22 LR or .17 HMR so you could quadruple that to 1,200 rounds or so. 🤷‍♂️

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Originally Posted by Triggernosis
Originally Posted by rickt300
Originally Posted by Triggernosis
Personally, I'd rather have 100 rounds of a cartridge that will lay an enemy combatant on his ass than 400 rounds of ammo that I've got to shoot him 4 times to put down, all the while hoping he doesn't clack off a hidden IED while he's flopping around.
5.56 had no business as a war cartridge.

The mountain of dead the 5.56 has piled up obviously has no effect on your opinion. Second anytime I can have 280 to 320 rounds over 140 I will take the formwer.
Well then, perhaps you should tote you some .22 LR or .17 HMR so you could quadruple that to 1,200 rounds or so. 🤷‍♂️

This is what a West Point education gets you nowadays I guess…

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They shoulda just kept the M1 Garand. John C. Garand even wanted to make it a .277 caliber but General MacArthur vetoed that because of the gazillions of rounds of 30-06 they had left over from WWI.


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After the last four years, I don’t a give a schidt if they use any caliber from 17 on up.


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Originally Posted by 257Bob
Never have liked the idea of the 277 Fury, makes no sense at all to me, three piece case seems overly complicated for a high-volume ammunition user like the US armed forces. It has basically the same case dimensions as the 308 Win. I think the 6.5 CM would have been a much better choice for practical purposes. The 277 Fury is ballistically similar to the 270 Win (130 gr @ 3,000 FPS).

The .277 Fury SAAMI (voluntary) MAP chamber pressure of 80,000 psi (551.6 MPa) enables a 135 grains (8.7 g) projectile muzzle velocity of 3,000 feet per second (914 m/s) from a 16-inch

277
136 gr
3000 fps
.493 G1
@ 1000 yards
v 1414
E 600
T -295"
MOA 28

6.5 Cm
135
2850
.584
@ 1000 yards
V 1508
E 682
T .298
MOA 28

Granted the G1 is not similar and the 277 is spec'd with a 16" barrel the CM seems close enough with a lot less bother.
It will slow the AAP s down when the already can't keep up with the rate that congress is giving our armaments away to foreigners.


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Originally Posted by Jeffrey
Originally Posted by Triggernosis
Originally Posted by rickt300
Originally Posted by Triggernosis
Personally, I'd rather have 100 rounds of a cartridge that will lay an enemy combatant on his ass than 400 rounds of ammo that I've got to shoot him 4 times to put down, all the while hoping he doesn't clack off a hidden IED while he's flopping around.
5.56 had no business as a war cartridge.

The mountain of dead the 5.56 has piled up obviously has no effect on your opinion. Second anytime I can have 280 to 320 rounds over 140 I will take the formwer.
Well then, perhaps you should tote you some .22 LR or .17 HMR so you could quadruple that to 1,200 rounds or so. 🤷‍♂️

This is what a West Point education gets you nowadays I guess…
My "nowadays" was mid 80's.

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Originally Posted by Jeffrey
Originally Posted by Triggernosis
Originally Posted by rickt300
Originally Posted by Triggernosis
Personally, I'd rather have 100 rounds of a cartridge that will lay an enemy combatant on his ass than 400 rounds of ammo that I've got to shoot him 4 times to put down, all the while hoping he doesn't clack off a hidden IED while he's flopping around.
5.56 had no business as a war cartridge.

The mountain of dead the 5.56 has piled up obviously has no effect on your opinion. Second anytime I can have 280 to 320 rounds over 140 I will take the formwer.
Well then, perhaps you should tote you some .22 LR or .17 HMR so you could quadruple that to 1,200 rounds or so. 🤷‍♂️

This is what a West Point education gets you nowadays I guess…


So, now we mock West Point graduates here?

Wow.

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Originally Posted by Jcubed
Originally Posted by Jeffrey
Originally Posted by Triggernosis
Originally Posted by rickt300
Originally Posted by Triggernosis
Personally, I'd rather have 100 rounds of a cartridge that will lay an enemy combatant on his ass than 400 rounds of ammo that I've got to shoot him 4 times to put down, all the while hoping he doesn't clack off a hidden IED while he's flopping around.
5.56 had no business as a war cartridge.

The mountain of dead the 5.56 has piled up obviously has no effect on your opinion. Second anytime I can have 280 to 320 rounds over 140 I will take the formwer.
Well then, perhaps you should tote you some .22 LR or .17 HMR so you could quadruple that to 1,200 rounds or so. 🤷‍♂️

This is what a West Point education gets you nowadays I guess…


So, now we mock West Point graduates here?

Wow.

Well their pledge has changed with the times, you know. Army values? Mourn maybe more than mock.

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Have I said this before ? Too complicated, too expensive (good for "losing" a few 100 large). And not made in the US of A, and that is a disgrace.

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