What's this new high test hybrid ammo that Sig is developing?

[bojangles808]

anyone have any insight? they talk about it briefly on the sig meateater episode @1:28:20.

 

[deerhunter628]

.277 Sig Fury. The brass has a steel end to handle pressure of something like 80,000 psi. Im not sure if that will make it in to the civilian world or just military.

 

[swavescatter]

I load my 6.5 CM to 80k PSI all the time...

 

[Mike D Texas]

.277 Sig Fury. The brass has a steel end to handle pressure of something like 80,000 psi. Im not sure if that will make it in to the civilian world or just military.

Fireformed nicely into 260AI.

Ran a 140 match burner up to 3236 in a 24” barrel before the Fed 210 primer pierced.


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[bojangles808]

probably should have googled first. interesting

What We Know About The 6.8×51 | 277 SIG Fury [UPDATED]

Explore the dynamics of .277 Fury vs 5.56 rounds, their history, technical specifications, and potential impact in military and civilian use.

blog.refactortactical.com

 

[turbobrick]

There is a guy on the hide cutting them down and converting to 8.6blk and pushing insane 12" barrel numbers. Its a really cool system, but its not something you can get max performance out of without an action like the Spear that was built to handle that kind of pressure, and even those have a limited life span. I think a purpose built 16-18" hunting rifle using this case necked to 6, 6.5, 7, or 7.62 would be a game changing tool, if it could be kept light enough.

 

[swavescatter]

Fireformed nicely into 260AI.

Ran a 140 match burner up to 3236 in a 24” barrel before the Fed 210 primer pierced.


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What powder?

Would backing it off a couple of grains put it right about there with 6.5 PRC handloads?

 

[Mike D Texas]

RL26.

The primer pierced at 55.0 grains and there was no more room for more powder. This was in relatively warm temps ~82°F.

53 grains gets in the mid 3100 range.


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[Mountainrancher]

Fireformed nicely into 260AI.

Ran a 140 match burner up to 3236 in a 24” barrel before the Fed 210 primer pierced.


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I thought I heard somewhere that the steel cases weren’t able to be reloaded?

 

[Mike D Texas]

I thought I heard somewhere that the steel cases weren’t able to be reloaded?

Only the case head up to about .300” from the base is steel. The rest of the case is brass.


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[wind gypsy]

Would a steel case head take more pressure than brass when it comes to piercing primers?

 

[Castle Rock]

Separate issues

 

[swavescatter]

Exactly. If the primer is the weak link...?

 

[Castle Rock]

I would imagine that sig are using a different primer than what is commonly available

 

[Mike D Texas]

Would a steel case head take more pressure than brass when it comes to piercing primers?

In my case yes, the primer was the weak link. With the load I ran it likely would’ve locked up the bolt with traditional brass.

Even with the load that pierced the primer, extraction was very easy.


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[wind gypsy]

In my case yes, the primer was the weak link. With the load I ran it likely would’ve locked up the bolt with traditional brass.

Even with the load that pierced the primer, extraction was very easy.

My curiosity is if having a steel case head and running high pressures is just going to result in more pierced primers.

 

[Castle Rock]

There is plenty of technology to avoid that, as I said above I am sure Sig isn’t using primers off the shelf from bass pro
Remington had a foray into electrically fired primers a while back, something like that would allow a very thick primer cup with no firing pin hole so theoretically no punctures

 

[Sundodger]

.277 Sig Fury. The brass has a steel end to handle pressure of something like 80,000 psi. Im not sure if that will make it in to the civilian world or just military.

I have seen the hybrid ammo for sale in my local gun shop, so it's already here for sportsman if they want it.

 

[Mike D Texas]

My curiosity is if having a steel case head and running high pressures is just going to result in more pierced primers.

Possibly. I’ve only tried it with Fed 210s. I’m thinking of trying it again with CCI250s or maybe CCI34 military primers.

But I wouldn’t get more powder in the case if I tried, at least not with RL26. Maybe with a faster powder.


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