Thinking ahead. .277Sig Furry low pressure loads.

Mitty38

Mitty38

Well-Known Member
Food for thought...

Since it is in some circles a good practice to have at least one gun with a chambering being able to handle the current military-Nato pick.



Been thinking,

Has any one given thought to developing a low pressure cast load for the .277 Sig Furry, since it is the domestic equivalent of the current military pick.

The parent case looks like it may be a 30/06 or 308.

Of course highly modified. Necked down version, With a steal base.
But whose to say regular 308 family brass, could not be formed to fit the chamber. And mouse fart, cast lead loads shot from this action. For practice and plinking sake.
While still having on hand if, God Forbid, the chance of having a desperate situation some day.
As in having to Savage rounds from dead soldiers, ect.

Case type
Rimless, bottleneck
Bullet diameter
.2780 in (7.06 mm)
Land diameter
.2700 in (6.86 mm)
Neck diameter
.3100 in (7.87 mm)
Shoulder diameter
.4611 in (11.71 mm)
Base diameter
.4703 in (11.95 mm)
Rim diameter
.4720 in (11.99 mm)
Rim thickness
.0540 in (1.37 mm)
Case length
2.015 in (51.2 mm)
Overall length
2.825 in (71.8 mm)
Rifling twist
1 in 7 in. (177.8 mm)
Maximum pressure (SAAMI)
80,000 psi (550 MPa)
 
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Bret4207

Bret4207

At the casting bench in the sky. RIP Bret.
The only thing I know about the new cartridge is that it's supposed to be aimed at defeating body armor, at least according to guys off Ft Drum I've talked to.

I'm still working on the 30-40 Krag... ;)
 
Ian

Ian

Notorious member
Umm, no thanks.

Counting this one, I come up with 21 different .270 chamberings already. I also don't get how they come up with the velocities they're getting, there just isn't enough room in that case for even the most dense canister powder to get advertised velocity with "only" 80K pMAX.

The .270 WSM already makes these numbers with conventional brass and rifles.
 
Glaciers

Glaciers

Alaska Land of the Midnight Sun
Another no thanks.
That goes for my personal avoidance of anything 270, with the possibility exception of a Savage rebore to 270 Savage.
Same goes for anything 7mm with the exception of the 7x57.
Since I’m airing my personal prejudices, any of the 300 super duper magnums excepting of course the original H&H loading.
I find that I’m just fine in a SHTF situation with my list of obsolete cartridges or cartridges on the short list for obsolescence and a couple of semi modern cartridges.
If that doesn’t work, then oh well.
 
fiver

fiver

Well-Known Member
SIG will sell you the all brass case version,, so you don't need the 4 dollar steel headed ones.
 
Ian

Ian

Notorious member
Just resize a .308 case without the expander ball and then run into a 7mm-08 shoulder-bump neck die with a .305" insert. Then you have.....a 55K pMAX cartridge with fewer bullet choices than either 6.5mm or 7mm. It would be pretty neat but not anything special.
 
fiver

fiver

Well-Known Member
seems a lot easier and cheaper to just go down and buy a Bergara in 270.
i got lots of 270 brass i'm never gonna use unless i really need some 25-06 brass.
 
RBHarter

RBHarter

West Central AR
A 27-08 ....... 85,95,100,110,120 gr for the 6.8s 2450-2200 fps MV and 110 gr Varmint bullets , 130 and 150s for the 3000-2750 fps MV for 270 .

The issue I see in it is the throat life at 80 kpsi . On a hot day 100 rounds in 10-20 mins is going to be too hot to touch . Then we add to that the steel jacket and/or heavy and hardened core .
In reality based on my dumbness H322 will get to 75,000 under a 130 or 140 gr bullet. There's probably some high tech bullet design hocus pocus like a coppered steel jacket that looks like a TSX.with out an open point , or possibly even a tungsten core in a copper otherwise solid .
 
fiver

fiver

Well-Known Member
yeah i see a 'solid' copper bullet too.
the army has been talking about 'green' bullets for a few years now.
i guess they don't want any enemy combatants dying from lead poisoning.
only problem with that is they will be boobin and crying abut it costing the tax payer 500 dollars for everyone our guys shoot because of the cost of the copper bullets.
 
CWLONGSHOT

CWLONGSHOT

Well-Known Member
ZERO intreat here as well.

Never been a 270 guy so easy for me to overlook it completely.

But before I had a Grendel I was tempted by the 6.8 SPC.

CW
 
todd

todd

Well-Known Member
i think the 80k is made from only the steel/brass cases. brass cases will do 60 - 65k.

my thing is the weight of gun and weight of ammo, not to mention the magazine is for only 20 rounds. add to the fact that recoil will be an issue.

there is a bunch of other stuff, but the 6.8x51 will not be military round. it is in the testing stage, not production stage.

the military would be better off going to the 6.5mm and the shorter a-15 action.
 
Mitty38

Mitty38

Well-Known Member
Hmm I was pretty sure the army already signed the contract with sign for the rifle and the round. Maybe I read something wrong.
 
todd

todd

Well-Known Member
last i heard they were testing it. Lake City ammo says that they will have ammo production in 2025 or 26. also in late 2023, in which we are now, Sig will have 250,000 rifles made to give to the infantry and engineers. i think that the time line is :headscratch:a little bit off?
 
Bret4207

Bret4207

At the casting bench in the sky. RIP Bret.
The more I read about it, the less sense it makes. They've got these kids hauling ridiculous loads of gear already and now they want to add to the load. And a 270?!! I can't help but wonder who chose that cal!
 
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