Federal 6.5 Backcountry?

[ARK_Ginger]

6.5mm Creedmoor has minimal case taper, square shoulders, tight chamber specs, and was designed for long, high-BC projectiles.

Legacy cartridges lack the aforementioned features and could easily turn increased chamber pressures into increased bolt thrust.

Yes I agree, but with our over litigative world I wouldn't have been surprised if they left it factory ammo only. That way they didn't need to publish 80k PSI load data for a legacy cartridge.

 

[Mike D Texas]

Total conjecture, but I think any capacity increases are minimal, and probably secondary to thinner walls.

I’m confident the pressure gains are from using faster burning powders.
ie 43gr of Varget or 8208XBR in a Creedmoor with the 153tmk, vs a standard pressure 40gr H4350 with the same bullet.

I can’t say for sure on the peak alloy cases but the NAS3 cases definitely have more capacity. 2+ grains more powder in a .308 case than a brass equivalent. I’ve heard them quoted as having somewhere around 10-11% more capacity.

 

[bnewt3]

I think it’s a good thing. Less recoil, shorter barrel 6.5 PRC.


My question would be since they did the Creedmoor why didn’t they do 7Rem mag +peak? Instead having to buy a brand new rifle in 7mm back country.

I love my 7BC 16.5 inch Barrel. But would have been nice to just buy a new barrel instead.


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Another reason to pilot with a new cartridge is that if its a failure, its a failure that doesnt affect any existing cartridges.

If you started with 7RM(or any other existing cartridge), Peak being a failure could tarnish the 7RM reputation and existing sales(which is considerable), and creates a weird footnote on the 7RM.

If Peak is a commercial failure with 7BC, it doesnt affect or minimally affects anything else.

Its a weird thing because its simultaneously the safe and risky play.

 

[DangerRanger]

I’m not sure how a random factory load being crap would effect the 7RM long term

Tons of meh factory loads come and go

 

[DangerRanger]

Anybody know how the 130 terminal ascent does? I’ll probably go for the tmk but would have preferred a 130 at 3100 over the 153 at 2900

 

[rileybassman]

Anybody know how the 130 terminal ascent does? I’ll probably go for the tmk but would have preferred a 130 at 3100 over the 153 at 2900

It's a bonded bullet, but IMO a pretty good one. We have killed probably 6-8 deer and antelope with them with good expansion and penetration in each instance. I like the bullet more than an accubond.

 

[Remington92]

Another reason to pilot with a new cartridge is that if its a failure, its a failure that doesnt affect any existing cartridges.

If you started with 7RM(or any other existing cartridge), Peak being a failure could tarnish the 7RM reputation and existing sales(which is considerable), and creates a weird footnote on the 7RM.

If Peak is a commercial failure with 7BC, it doesnt affect or minimally affects anything else.

Its a weird thing because its simultaneously the safe and risky play.

I'd imagine it was also a semi easy way to cover rifle manufacturers to "certify" that their actions could handle the 80k psi in real world use in a limited controlled manner without everyone testing it on actions out in the wild already all at once. Even though I'm sure they knew the math was good they probably wanted to make sure they weren't going to be creating a ton of Kentucky Ballistics and 50bmg slap round incidents.

 

[Frozenlead]

Yesterday Proof posted up some velocities from some 143eldx hand loaded +peak out of one of their new PXT barrels. Around 3030FPS