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Military Guns and Ammunition

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This is intended for people interested in the subject of military guns and their ammunition, with emphasis on automatic weapons.

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NGSW Phase 2 Consolidation and info   Small Arms <20mm

Started 30/8/19 by gatnerd; 745479 views.
smg762

From: smg762

5-Sep

whats the BC of 6.8, is it higher than .200?

also i think they should have gone with a 6.5@ 2400ft lbs. it wuold match the 6.8 at long range

Mr. T (MrT4)

From: Mr. T (MrT4)

5-Sep

New high BC 25cal bullets are now appearing 

We might jet see .25cal gaining traction in shooting sports

EmericD

From: EmericD

5-Sep

smg762 said:

whats the BC of 6.8, is it higher than .200?

The BC of the military EPR bullet is unknown, but the BC of the 135 gr FMJ "training practice" bullet is above 0.24 (C7), so already equivalent to the .308" 175 gr Sierra MatchKing.

This "reduced power, low recoil, training round", is already delivering a better trajectory from a 13.5" carbine than the M118LR fired from a 20" barrel...

gatnerd

From: gatnerd

7-Sep

Came across this on Twitter, debated wether this was NGSW or Shell Shock related. BAE seems to also have developed a specialized steel case design, possibly capable of higher (ngswish) pressures, and likely offering weight savings as well. 

https://twitter.com/TotherChris/status/1625920145674600448

stancrist

From: stancrist

7-Sep

gatnerd said:

BAE seems to also have developed a specialized steel case design, possibly capable of higher (ngswish) pressures, and likely offering weight savings as well.

There reportedly is a weight savings, but the 5.56 / 7.62 ammo is not loaded to higher pressures.

BAE Systems providing lighter small arms ammunition to lower soldiers’ burden - EDR Magazine

But BAE may not be still pursuing this.  There is nothing on their site, and the article is 4 years old.

Looks like BAE may have changed to a one-piece steel case.  The article below is from 2 years ago.

The New Lightweight Bullet That Saves Fatigue ... And Fuel (forces.net)

smg762

From: smg762

14-Sep

did the 556 CT rounds offer any reduction in volume

smg762

From: smg762

14-Sep

what was the barrel length on the textron rifle. it looks like 16, and yet the round apparently didnt hit 80k PSI

smg762

From: smg762

14-Sep

with wider cartridges like the 6ARC, could you some how angle the magazine at 45 degrees to improve prone shooting?

and then somehow use a special feed ramp to get the bullets in barrel

stancrist

From: stancrist

14-Sep

smg762 said:

what was the barrel length on the textron rifle.

IDK.

nincomp

From: nincomp

14-Sep

smg762 said:

did the 556 CT rounds offer any reduction in volume

Here is a 2014 presentation of the 5.56 LSAT.  Main selling point was ammo weight reduction, largely for linked.  37% weight reduction, 12% for volume.

https://ndiastorage.blob.core.usgovcloudapi.net/ndia/2014/armaments/Wed16533_Shipley.pdf

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