Post by Bullshop on Mar 2, 2020 19:14:44 GMT -7
Has anyone been watching the development of the new 277 Sig Fury ? This is a 277 caliber on a 308 Win size case that is getting 3000 fps with a 140gn bullet in a 16" barrel or 3400 fps in a 24" barrel. This performance from a 308Win size case is made possible by the unheard of chamber pressure of 85,000 psi. Yes you read that right eighty five thousand psi.
That's the new part, now the old part. The 85,000 psi is made possible by the use of a stainless steel case head. Sound familiar ? Go back to the 50's when Jack O'Conner and Elmer Keith were gun magazine rivals each every month disputing the others praise for their preference while at the same time heaping accolades of praise on their perceived superior choices. For Jack it was without question the 270 Win and for Elmer it was anything big bore that hurled at minimum a 250gn bullet to a velocity that could drive it through an elk lengthwise if not possibly two elk.
Read the adds in the gun mags of the era and one of the adds you will see regularly available is for the O'Conner steel case heads. That's right he sold stainless steel case heads that threaded into a brass case body. To look at the new 277 Sig Fury assembled case is to look at the assembled O'Conner case as in appearance they are identical.
As for internal at this point I have no idea. One nice part about the O'Conner system is that you only had to buy the steel case heads one time as you could easily replace the brass case body when needed. As for the Sig I do not know but what I am willing to assume is that if they are only as a unit steel head/brass body they will be more expensive to replace and even though the SS case head will likely never wear out the brass case body most certainly will.
Anyway this development has piqued my interest. Getting on in years its much more difficult to indulge my joy of roaming the hills in winter with a rifle capable of first shot long range hits because such rifles are usually long and heavy. But now looking at the 3000 fps from a .277 caliber 140gn bullet from a 16" barrel you just might be able to build that long range potential into a small stiff light package. Also once the technology is fully developed I suspect it will include other calibers like my favorite for coyotes 6mm/243.
A 243 caliber rifle the size and weight of a Ruger 10-22 but with 800 yard precision potential would certainly get my attention and likely some of my funding. This development is something I plan to watch because even though I do so much enjoy using the old ones from pre cartridge up to smokeless powder I am still wise enough to realize that tech is where cutting edge performance lies and in my fur harvest I want every advantage I can gain.
For anyone that has not heard of the new 277 Sig Fury here is a start,
www.gunsamerica.com/digest/277-sig-fury-demystified/
That's the new part, now the old part. The 85,000 psi is made possible by the use of a stainless steel case head. Sound familiar ? Go back to the 50's when Jack O'Conner and Elmer Keith were gun magazine rivals each every month disputing the others praise for their preference while at the same time heaping accolades of praise on their perceived superior choices. For Jack it was without question the 270 Win and for Elmer it was anything big bore that hurled at minimum a 250gn bullet to a velocity that could drive it through an elk lengthwise if not possibly two elk.
Read the adds in the gun mags of the era and one of the adds you will see regularly available is for the O'Conner steel case heads. That's right he sold stainless steel case heads that threaded into a brass case body. To look at the new 277 Sig Fury assembled case is to look at the assembled O'Conner case as in appearance they are identical.
As for internal at this point I have no idea. One nice part about the O'Conner system is that you only had to buy the steel case heads one time as you could easily replace the brass case body when needed. As for the Sig I do not know but what I am willing to assume is that if they are only as a unit steel head/brass body they will be more expensive to replace and even though the SS case head will likely never wear out the brass case body most certainly will.
Anyway this development has piqued my interest. Getting on in years its much more difficult to indulge my joy of roaming the hills in winter with a rifle capable of first shot long range hits because such rifles are usually long and heavy. But now looking at the 3000 fps from a .277 caliber 140gn bullet from a 16" barrel you just might be able to build that long range potential into a small stiff light package. Also once the technology is fully developed I suspect it will include other calibers like my favorite for coyotes 6mm/243.
A 243 caliber rifle the size and weight of a Ruger 10-22 but with 800 yard precision potential would certainly get my attention and likely some of my funding. This development is something I plan to watch because even though I do so much enjoy using the old ones from pre cartridge up to smokeless powder I am still wise enough to realize that tech is where cutting edge performance lies and in my fur harvest I want every advantage I can gain.
For anyone that has not heard of the new 277 Sig Fury here is a start,
www.gunsamerica.com/digest/277-sig-fury-demystified/
. the caseless design was some powder and some dried "glue". it was a good idea at the time. but the technology just wasn't there.