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Campfire Tracker
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OP
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The military has chosen the .277 bore (6.8mm) for its new squad rifle and machine gun. That is why SIG, that has the contract to supply 9mm pistols, developed the 277 Fury.
These contracts are worth millions perhaps billions of dollars. Look for many new developments in all things for the .277 bore.
Interestingly, SIG chose a 140 grain bullet at, fanfare, 3000!
Many years ago Brian Litz wrote an article on “scaling” in which he described the factors that he considered in the design to optimize modern high BC bullets. He mentioned both the 6.5 and 7mm with the 6.5 being just a little small and the 7 as being a just a little big. He considered bullet weight and recoil. So, I wrote to him twice to suggest the obvious, that the .277 would be optimal. He never responded.
Perhaps the engineers at WW made a great decision when they designed the 270 Win!
Last edited by RinB; 01/26/20. Reason: Grammar & because of 30-03
“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”. Antoine de Saint-Exupery. Posted by Brad.
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Campfire Tracker
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Campfire Tracker
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Yes, Sig is running .277 at 80,000 PSI and with the ability to swap in new barrels, 'cause you're gonna want to. The history of how our military chooses things would leave one to believe they chose .277 just to be different.
Living in a world of G17s and 700s, wishing for P7s and 202s
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Campfire Ranger
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Campfire Ranger
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Gays, trannies, in the military now this😂
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Joined: Sep 2010
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Campfire Ranger
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Campfire Ranger
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Gays, trannies, in the military now this😂 Yeah, just what we need. (sarcasm) " Back when ", I was running 140 HBTSP at 3000 fps, Surplus 4831 -- long case life. Not much new. NOW we have new/better powders to BOOT. Jerry
Last edited by jwall; 01/26/20.
jwall- *** 3100 guy***
A Flat Trajectory is Never a Handicap
Speed is Trajectory's Friend !!
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Campfire Ranger
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Campfire Ranger
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Hope they do give the 270’s some new life. Although my old ones work fine too.
Semper Fi
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Joined: Sep 2014
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Campfire Ranger
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Campfire Ranger
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A 277 140 @ 3k with 80k psi.
Yep, you are going to need to change those barrels.
Parents who say they have good kids..Usually don't!
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Joined: Dec 2004
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Campfire Tracker
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Campfire Tracker
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Actually it was a .277x'03. Same daddy as the '06.
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." Albert Einstein
At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".
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Campfire Ranger
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Campfire Ranger
Joined: Nov 2007
Posts: 29,650 Likes: 5 |
Actually it was a .277x'03. Same daddy as the '06. Great minds!
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Campfire Ranger
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Campfire Ranger
Joined: Mar 2005
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Gays, trannies, in the military now this😂 Now that's funny--and this is coming from a 270W loony.........
Casey
Not being married to any particular political party sure makes it a lot easier to look at the world more objectively... Having said that, MAGA.
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Joined: Mar 2005
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Campfire Ranger
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Campfire Ranger
Joined: Mar 2005
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Yes, Sig is running .277 at 80,000 PSI and with the ability to swap in new barrels, 'cause you're gonna want to. The history of how our military chooses things would leave one to believe they chose .277 just to be different. Jeez, I can do that with RL26 and a 150 grainer and still stay under 65K..........I think........
Casey
Not being married to any particular political party sure makes it a lot easier to look at the world more objectively... Having said that, MAGA.
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Campfire Tracker
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OP
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Well the claim of 140’s @ 3000 is out of a 16”, yes SIXTEEN inch barrel.
“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”. Antoine de Saint-Exupery. Posted by Brad.
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Campfire Ranger
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Campfire Ranger
Joined: Apr 2011
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Well the claim of 140’s @ 3000 is out of a 16”, yes SIXTEEN inch barrel.
That’d be a slayer in an AR15 framed rifle.
Semper Fi
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Campfire Regular
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Campfire Regular
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Yes the 16 inch barrel is the difference. I run 130s all day long at damn near 3100 out of a 22 inch barrel but increase that to 140 and it's barely 3000, if that. Now whack 6 inches off that barrel and it's barely 2800. So Sig came up with this super strong case and I'm guessing "WUNDER POWDER" and it's back over 3000. That's smoking for a 16" barrel.
What goes up must come down, what goes around comes around, there's no free lunch. Trump's comin' back, get over it!
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
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Yes, Sig is running .277 at 80,000 PSI and with the ability to swap in new barrels, 'cause you're gonna want to. The history of how our military chooses things would leave one to believe they chose .277 just to be different. Jeez, I can do that with RL26 and a 150 grainer and still stay under 65K..........I think........ No you can't not in s 308 sized case and a 16" barrel
I got banned on another web site for a debate that happened on this site. That's a first
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Joined: Sep 2014
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Campfire Ranger
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Campfire Ranger
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Parents who say they have good kids..Usually don't!
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Campfire Outfitter
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Campfire Outfitter
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The late Homer Powley showed that barrel wear is caused by flame cutting which, in turn, increases with pressure. This is why barrels wear out from the chamber on. At 80,000 psi, barrels won't last long.
Who needs a 16" barrel anyway in a hunting rifle? As for military rifle clones, like the AR15 is a clone of the M16, I imagine that special 80,000 psi ammo will cost A LOT more than .223/5.56mm.
Don't blame me. I voted for Trump.
Democrats would burn this country to the ground, if they could rule over the ashes.
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Campfire Ranger
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Campfire Ranger
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Same length, but the shoulder is further forward, and of course a sharper angle, giving it more capacity.
Casey
Not being married to any particular political party sure makes it a lot easier to look at the world more objectively... Having said that, MAGA.
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Oct 2000
Posts: 30,286 |
Not sure I care what the US military does or “thinks”... the fact remains, the 270 Win is The Western Big Game Cartridge. A perfect balance of power, trajectory, recoil, and performance. In North America and worldwide.
“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery
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Campfire Outfitter
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I vote for expanding bullets, too.
Obey lawful commands. Video interactions. Hold bad cops accountable. Problem solved.
~Molɔ̀ːn Labé Skýla~
Member #547 Join date 3/09/2001
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This is going to be great.
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