Federal New Cartridge

[deerhunter628]

Federal doesn't make hybrid 277 fury brass. Are you talking just federal brass 308win at normal pressures?
Also, I would not shoot high pressure rounds from a standard AR10.

What velocity did you get from a 308? Rifle specs please.

 

[z987k]

What velocity did you get from a 308? Rifle specs please.

I have not run it as a 308. But you should expect about 200fps faster than a 308 for the same bullet in the same gun.

 

[deerhunter628]

I have not run it as a 308. But you should expect about 200fps faster than a 308 for the same bullet in the same gun.

Great. Thanks for the info.

 

[Gtscotty]

As long as the action can withstand one of the modern magnum case head rounds running at 65kpsi(6.5prc), it can handle a standard case head at 80k since it's less bolt thrust.
An unknown with the pure steel case is how much the case is gripping the chamber and how much of that thrust is being transferred to the bolt. But if they're still under 80k, I can't see how you couldn't just run this in any modern action.

My thoughts exactly, I don't really think this cartridge would be a concern for a modern action that can be chambered in or is strong enough for a normal magnum. Bolt thrust for a .473 case head at 80ksi should be very similar to and maybe a hair less than the bolt thrust from a .532 case head at 65ksi, pressure over the internal cross sectional area of the pressure vessel and all that.

I too was wondering if the high strength steel case might limit bolt thrust even more by taking a higher proportion of the load while pressed against the chamber wall under pressure....I suspect it would to some extent and that might be a notional advantage over the hybrid design. If that is part of the equation, I'm sure case wall geometry plays a part and the straighter case body of modern designs might benefit more.

I'm also having fun with the .308 and 6.5 Fury, .308 is an easy one pass, where the 6.5 takes a couple steps and requires neck turning. Even bumping up the pressure a bit has been quite interesting, Staball 6.5 works well for putting some steam to the 6.5 case.

 

[deerhunter628]

My thoughts exactly, I don't really think this cartridge would be a concern for a modern action that can be chambered in or is strong enough for a normal magnum. Bolt thrust for a .473 case head at 80ksi should be very similar to and maybe a hair less than the bolt thrust from a .532 case head at 65ksi, pressure over cross sectional area of the internal pressure vessel and all that.

I too was wondering if the high strength steel case might limit bolt thrust even more by taking a higher proportion of the load while pressed against the chamber wall under pressure....I suspect it would to some extent and that might be a notional advantage over the hybrid design. If that is part of the equation, I'm sure case wall geometry plays a part and the straighter case body of modern designs might benefit more.

I'm also having fun with the .308 and 6.5 Fury, .308 is an easy one pass, where the 6.5 takes a couple steps and requires neck turning. Even bumping up the pressure a bit has been quite interesting, Staball 6.5 works well for putting some steam to the 6.5 case.

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What velocity are you getting from 308? Will you give rifle specs? What powder are you using for 308?

 

[Oddfellow]

I have to say, when I first heard about it, I was a real skeptic. The more that I read about it, and the more videos that I watch, I am becoming really intrigued. To be honest, to the point of really starting to want one. This could be equivalent to what tungsten shot did to waterfowl and turkey hunting. It would also be nice to see someone else come out with something new besides the company that starts with “H.” No offense, but I like a little variety in life. I might end up being the guinea pig.

 

[ianpadron]

Results look promising. More speed, less barrel, less powder. How do you argue against any of that? Hope it sticks and that the underlying tech makes its way downstream to 223 6 and 6.5 variants

 

[AZ_Hunter]

My thoughts exactly, I don't really think this cartridge would be a concern for a modern action that can be chambered in or is strong enough for a normal magnum. Bolt thrust for a .473 case head at 80ksi should be very similar to and maybe a hair less than the bolt thrust from a .532 case head at 65ksi, pressure over the internal cross sectional area of the pressure vessel and all that.

I too was wondering if the high strength steel case might limit bolt thrust even more by taking a higher proportion of the load while pressed against the chamber wall under pressure....I suspect it would to some extent and that might be a notional advantage over the hybrid design. If that is part of the equation, I'm sure case wall geometry plays a part and the straighter case body of modern designs might benefit more.

I'm also having fun with the .308 and 6.5 Fury, .308 is an easy one pass, where the 6.5 takes a couple steps and requires neck turning. Even bumping up the pressure a bit has been quite interesting, Staball 6.5 works well for putting some steam to the 6.5 case.

View attachment 818872
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What rifle are you shooting the 6.5 out of and how much gain over brass 6.5?

 

[bojangles808]

alterra with less fanboyish take on things. Wont spoil it but I appreciate how they provided data like groups, hit rates, SDs, and ES

 

[NorCal 707]

7mm Backcountry is the name of the new cartridge. PRC performance with a 20 inch barrel. I actually saw it equalling the PRC with a 16 inch barrel. It's for the guys running suppressors. 80k psi round. It's like a 280 Ackley improved improved again. Almost the same case when you stand them side by side.

 

[Gtscotty]

What velocity are you getting from 308? Will you give rifle specs? What powder are you using for 308?

I've just started with the .308 fury cases, but currently working with my SFAR and am not going for overloads. As a mid-gas lightweight .308, the SFAR is rough on brass, even at low charge weights, so my first usage there is aimed at running full power book loads without having the brass torn up. I do have a .308 barrel for my Cross that I'm going to try spicy loads with eventually, but I don't want to pull down my 6.5 barrel and I'm still looking for someone that will sell me a barrel extension.

This guy on the hide has done some load work with high pressure .308 and made several posts about it so you could search him.

Post in thread 'Federal does it again ' https://www.snipershide.com/shooting/threads/federal-does-it-again-😅.7242981/post-11949063

What rifle are you shooting the 6.5 out of and how much gain over brass 6.5?

I'm using an 18" Sig Cross, but I personally wouldn't be concerned about using something like a Tikka where the exact same action is used with a different bolt cut for WSM.

These are 130gr TGK over Staball 6.5, I think the QL model estimate topped out at ~75ksi for the top load, that's from memory though, could be off. Also, I have to use a modified H100V model in QL to get accurate velocity estimates for STB 6.5 as their built in STB 6.5 model is really far off reality and they don't seem interested in fixing it.

45.5 - ~2,843 fps
46 - ~2,867 fps
46.5 - ~2,904 fps
47 - ~2,942 fps

Now that hunting season is over I'm going to work with 143gr and 147gr to see what the fury will do over my normal loads.

 

[letrbuck]

@Unknown Munitions, when can we expect one with a +p chamber so we can really wake this SOB up?

 

[strattonje2020]

Ill say I'm not hater of anything new coming out even if its marginally improved. This technology most likely is the future of ammo especially since being adopted by the US army.
I watched a lot of the videos on this and read some articles. Fierce said they will only guarantee 1 inch moa out of this round and I don't think I seen anyone post a published group under 1 moa. Be interesting to see if you can get sub to half moa out of this.

I would actually love to get this in a new rifle build but after the 7 prc butt f$cking us its hard to trust anything new right now. I believe they will get the speeds, but at what cost to accuracy. Time will tell I guess.

 

[Article 4]

Ok so this is spomer so take it how you will

Peak alloy cases used in nuclear reactors that uses magic (spomers words) rated at 80k psi - they claim out of a 30-06 style and size - that competes in velocity directly with the 28 nosler

So does Kuiu or sitka make Hazmat camo so I can shoot this?

 

[Article 4]

Ill say I'm not hater of anything new coming out even if its marginally improved. This technology most likely is the future of ammo especially since being adopted by the US army.
I watched a lot of the videos on this and read some articles. Fierce said they will only guarantee 1 inch moa out of this round and I don't think I seen anyone post a published group under 1 moa. Be interesting to see if you can get sub to half moa out of this.

I would actually love to get this in a new rifle build but after the 7 prc butt f$cking us its hard to trust anything new right now. I believe they will get the speeds, but at what cost to accuracy. Time will tell I guess.

If you want, instead of going with the offered mainstream 7PRC - grab a 300 PRC and neck it to 7mm - same dies, same case specifications, all you do is change the neck size.

just grab a smaller bushing and go to work

 

[MuleyFever]

alterra with less fanboyish take on things. Wont spoil it but I appreciate how they provided data like groups, hit rates, SDs, and ES

That was a pretty good video. It will be interesting to see if Federal moves to some smaller calibers with this design.

 

[gbflyer]

I wonder what 80K psi will do to the lug abutments over time.

 

[littlebigtine]

More psi is more recoil right? Why is this changing the game? Its not like your having your cake and eating it 2… some one carr to clear this up for me? A 6.5 creed running that 80k psi approaches 6,5 prc capability? But the recoil would also be trending that direction?

 

[Sundodger]

I wonder what 80K psi will do to the lug abutments over time.

Their claim is that the new case keeps the bolt loading the same. I am skeptical of it, and would like to see them show their work on that.

More psi is more recoil right? Why is this changing the game? Its not like your having your cake and eating it 2… some one carr to clear this up for me? A 6.5 creed running that 80k psi approaches 6,5 prc capability? But the recoil would also be trending that direction?

Not necessarily, recoil is in energy and PSI is force. I think the argument they are making for lower recoil is that they have less ejection mass from using less powder.

Edit: To answer your other question, yes if you increase the velocity of a given projectile and keep all other variables the same, you will get more recoil. Velocity is squared in the KE equation.

 

[MarkOrtiz]

a 6mm Backcountry and 6.5mm Backcountry has to be in the works.

Also you know Hornady is plotting something. Can't wait to see what they come out with to counter

I heard on one podcast that Federal was planning on this being a family of cartridges. That might just be in the works.