277 fury

[Andrew Massi]

Sig sauer is releasing a new rifle and cartridge at shot show the 277 fury
Sure looks like a 270 prc to me
http://soldiersystems.net/2019/12/1...-bolt-gun-and-caliber-sig-cross-277-sig-fury/

 

[highdrum]

I believe is non Magnum case head, almost like a 270/308 wildcat. Notice the brass, has two pieces, case head seperate from body, I saw this year's back with a pistol ammo company. I believe it's a steel case head that'll never wear out or lose primer, just the body takes the wear. Innovation.......its what fuels the beast.

 

[snookntarpon]

steel case bottom will let you load to much higher pressures. Should allow for faster burning power and magnum speed out of shorter barrels

 

[djkynoch]

This cartridge is more exciting that you even know! I remember when I was a kid seeing a cartridge design similar to this that Dick Casull made. It used the steel base on the case along with a stronger action design to run up pressure safely so you can get more velocity with less powder, meaning less erosion, more velocity with a short barrel etc..

He was getting 3300 FPS with a 240 grain 30 cal bullet and 60 grains of powder. From what I hear the 277 Furry will push 140 grain bullets at over 2900 FPS out of a 16 inch barrel with a lot less powder than you would expect.

 

[Andrew Massi]

This cartridge is more exciting that you even know! I remember when I was a kid seeing a cartridge design similar to this that Dick Casull made. It used the steel base on the case along with a stronger action design to run up pressure safely so you can get more velocity with less powder, meaning less erosion, more velocity with a short barrel etc..

He was getting 3300 FPS with a 240 grain 30 cal bullet and 60 grains of powder. From what I hear the 277 Furry will push 140 grain bullets at over 2900 FPS out of a 16 inch barrel with a lot less powder than you would expect.

I got you, so in essence a 6.8 creedmoor

 

[djkynoch]

I got you, so in essence a 6.8 creedmoor

Except if you necked a 6.8 Creedmoor up to 277 and put it in a 16 inch barrel you would not get close to 2900 FPS safely . The steel base and stronger action allows pressures to be ran up to maybe 100,000 PSI safely. I am just guessing on the pressure we will have to wait for the official release.

 

[Andrew Massi]

Except if you necked a 6.8 Creedmoor up to 277 and put it in a 16 inch barrel you would not get close to 2900 FPS safely . The steel base and stronger action allows pressures to be ran up to maybe 100,000 PSI safely. I am just guessing on the pressure we will have to wait for the official release.

Guys are hitting 2900 with 140s and rl26. Out of the little creed and 260rem.
Going to be an interesting shot show with sig releasing this and nosler maybe releasing some high bc .277 bullets and a 27 bowler

 

[djkynoch]

Guys are hitting 2900 with 140s and rl26. Out of the little creed and 260rem.
Going to be an interesting shot show with sig releasing this and nosler maybe releasing some high bc .277 bullets and a 27 bowler

Out of a 16 inch barrel? and what was the pressure from a lab?

 

[Andrew Massi]

Out of a 16 inch barrel? and what was the pressure from a lab?

Yes short Barrels
Not sure on the pressure but would likely be around 61kpsi.

 

[Axl]

A couple years ago a company called Shell Shock Technologies was going to make 9mm and 223 in a 2 piece w/SS head, but i don't know if they ever did
There was a company selling "brass" with a stainless head 20+ years ago. Seems like it had a reduced capacity and was real expensive.
If the military adopts it might be able to get some nice 1x fired! They sure won't utilize the extended brass life on those.

 

[highdrum]

Yes short Barrels
Not sure on the pressure but would likely be around 61kpsi.

Nobody is getting 2900+ fps w/ 140s from creed/260 from a short barrel, nobody. 24-26" yes it's doable. But still operating at max psi.

 

[Andrew Massi]

Nobody is getting 2900+ fps w/ 140s from creed/260 from a short barrel, nobody. 24-26" yes it's doable. But still operating at max psi.

Ok

 

[del2les]

Steel head cartridge cases have been around, in various forms, for several decades. I think it was 1984 when O'conner had one, and in 1985 Everlasting introduced theirs. I remember reading varied shooting articles through the decades and even played with a couple. At the time, the rifle cases did not impress me, but maybe they have worked a few of the kinks out.

The pistol versions required special loading/reloading techniques to keep the brass/steel joints from separating. I always liked the theory behind these, and in a very strong made firearm, pressures and velocities could get interesting. In the wrong firearm - disaster.

 

[elkaholic]

I'd like to remind everyone that having an efficient case is good, and being able to handle pressure is good. Believing that using a little less powder but at the same time, running pressures over 70,000, however: will not increase barrel life just because less powder is used. Look at the charge as the gas in a cutting torch that creates the heat and the blast of oxygen as the pressure that makes the metal flow.Thats how throats are torched! So, decreasing one, while increasing the other may not accomplish much when it comes to the throat erosion.