National FOX News Story on Rifles

[RicInOR]

US Army eyes new automatic rifle that fires with pressure equivalent to tank: report

Note their headline:

US Army eyes new automatic rifle that fires with pressure equivalent to tank: report


What does that mean?
How much pressure is in the breach when a modern tank fires? Different for SABOT vs HE ?


Now their subheadline is either outstanding, outlandish or misleading
New US Army assault rifle with power of a tank

I'm no tanker, my uncle rode with Patton in the desert, but those are powerful machines. How on earth could that be on a soldiers shoulder?



Military Times has a slightly different headline to this story.
More than a rifle: How a new 6.8mm round, advanced optics will make soldiers, Marines a lot deadlier


Military Firearms Fox News Report | National Review


TL;dr folks, not the .458 HAM'R, but rather the 6.8mm Remington SPC.

Read More

 

[Medic!]

6.8 Wow!

I heard Hiroshima was the result of a single 30-06 strike.

 

[Wombat of Doom]

Not that kind of tank. My hot water heater tank.

 

[nwslopoke]

Was that some kind of trailer? The next evolution in news. I like it.

 

[bsa1917hunter]

Not that kind of tank. My hot water heater tank.

Mine is an on demand. It's always there and ready when I need it..

 

[No_Regerts]

So everything that is 50,000 CUP is as powerful as a tank. Sweet.

 

[CamoDeafie]

LOL. I saw that headline too...

From wikipedia on the Rheinmetall 120mm L55 cannon as used on Leopard 2A6 tanks; peak pressure is 84,122 PSI, propelling saboted rounds to velocities of 5,900+FPS says higher pressure than the L44 cannons used on US M1A1/A2 tanks.

So... they're wanting a 6.8 caliber doing muzzle energy 2-5× what 5.56 M855 are doing from 20" barrels... so theyre wanting it to do between 2,782 ft-lbs to 6,965 ft-lbs...

6.5 Creedmore does 2,430 ft-lbs with 120gr;
6.8 Rem Spc only does 1,780 ft-lbs with 85 gr from 16" barrel; however 6.5 Rem Magnum does 2,745 ft lbs with 120gr, probably from 24" barrel....

So basically theyre shooting for a major leap in ballistics while maintaining weight and recoil
Ballistics, their goal seems to be similar performance to that found in the huge magnum cartridges (8mm rem magnum is doing 4,394 ft lbs out of 26 inch barrel with 180gr bullets)...

 

[osprey]

The technology that is being bantered around is telescoping polymer cased rounds. It is somehow able to produce higher velocities and does not exert the corresponding pressures traditional brass cased ammo would in the chamber. Pretty wild stuff.

 

[CamoDeafie]

The technology that is being bantered around is telescoping polymer cased rounds. It is somehow able to produce higher velocities and does not exert the corresponding pressures traditional brass cased ammo would in the chamber. Pretty wild stuff.

Don't you mean telescoped caseless rounds?

 

[osprey]

The powder primer and projectile are all housed in some kind of polymer holder or case. It does not have a traditional brass casing.

 

[CamoDeafie]

Hm. Cased telescoped rounds. I guess reliable caseless ammo was really too much to ask for.... I do seem to recall a while back that the US Mil was wanting to go caseless because of potential advantages of the concept.....such as not having brass to clean up, and being theoretically lighter than cased rounds.

 

[osprey]

They are supposedly lighter but bulkier. Also The polymer does not conduct heat like brass so weapon would tend to absorb the heat the brass casings would take normally away which is one of the hurdles.

 

[thorborg]

I'm just waiting for the miscreants heads to blow from all the misinformation they have spewed. Sooner or later you'd think they would reach the saturation point.