I don’t think those are the powders for the 7 BC, but maybe you were referring to something else.

maybe a PRC. What do you think the 7BC will shine with?

I don’t know, Buzz, but I suspect it will be something quicker than those two.

Backcountry appears to be the size of a 280 AI. Whatever powder is on the faster side for 280AI would be my guess. You need to be able to cram enough in there to get your 80k pressure.

I ran a QL on 280 AI, 20” barrel and 80k for the ceiling. N560 was the velocity winner at 2944 fps and a 108% load ratio. To get down to a 100% ratio RL 16 will do 2867 fps. QL is usually pretty conservative, YMMV.

This author got better than advertised velocity in his testing.

https://www.gunsamerica.com/digest/...-fastest-production-7mm-rifle-cartridge/

waiting on some actual live testing by someone here

Have the rifle just need ammo

Be nice to see them loaded with 175 eldx or 175 EH

In a 28 Nosler, we are running a Berger 195 at 2860 fps in a 20" suppressed currently. In a 22", we are running it a little over 2900 fps. In the 26", I'm seeing 3000-3050 fps. This is real world confirmed velocities. And the 28 Nosler is one of the MOST accurate rounds I've played with. I don't see what this 7 Backcountry can do that we are not already doing with a 28 Nosler, even in the shorter barrels. And I KNOW the 28 Nosler will shoot very well.


He stated: I chronographed the load I used on the hunt, which employs a 175-grain Fusion Tipped bullet, at 3,024 feet per second. That’s a little faster than factory-stated velocity, and that was out of a 20-inch barrel. It’s even faster in a longer barrel. These numbers are unreachable with any other same-weight factory 7mm cartridge in same-length barrels.


Their 7 Backcountry "published" data:

The loads and their factory-stated muzzle velocities and G1 ballistic coefficients are:

175-gr. Fusion Tipped 20-inch 2,975 fps / 24-inch 3,125 fps / G1 .575

195-gr. Berger Elite Hunter 20-inch 2,850 fps / 24-inch 3,000 fps / G1 .755

Not a massively long video but this one is interesting I feel and I am not a reloader.

https://youtu.be/OgKWnVUD0DU?si=yts49DP-4yy2mITo

I recently interviewed Matty Nelson with Seekins and he spoke about their new design builds, to handle the "many" more high pressure calibers coming out, soon...

How about just a federal case for the 223 @ 80k psi

Like Bobo is saying, I would be more interested in cartriges for existing cartridges at higher pressures than a new cartridge.

I should get ammo maybe as soon as today but if it shows up tomorrow I will be off chasing coyotes so might be a few days before I get to shoot the 7 BC.

Bobo mentioning the 223 makes me wonder if 80k of pressure down an AR barrel would be feasible… I would guess no. The bolt thrust problem is solved by the stronger brass but that doesn’t change how much gas is shooting thru that gas port. I am sure there will be folks working on that type issue but it may take a while before all cartridges are running those pressures.

On a side note a little birdie told me factory 22 Creedmoor ammo should be showing up on shelves of a couple retail outlets ….. Scheels was mentioned not sure who else.
Also look for a varmint load later this year and it’s NOT the 62gr

From Federal's website:

"Patented Peak Alloy case technology is fundamentally different than brass cases. It utilizes a proprietary steel alloy that includes other unique elements. This same alloy is used in manufacturing safes, nuclear reactors and other high-strength applications. Peak Alloy allows Federal to safely increase chamber pressures far beyond the limits of brass case ammunition, significantly increasing velocity and energy. The Peak Alloy case is also reloadable when following Federal’s lab-tested processes and data."

How much force is going to be required to size the case?

Is it going to require a press that we don't know about yet?

It it going to require a cheater pipe on the press handle?

Lot of scuttlebutt about reloading so not really sure 100% what’s true.
You will only be able to neck size is what RCBS rep says and you can’t anneal it either with the nickel coatings. Sounds like a Lee collet type die might be an option.
Once I have some empty brass that’s what I will probably try first.

My phone has already rang a couple of times about this cartridge, and reloading it.

All I can answer is I don't know what I don't know yet.

How would you remain safe if someone introduced an 80K PSI load that chambers in a 30-06? 84K is the proof load. Not sure we want folks who don't know better running loads like that in a 1903 Springfield for instance. I think they would need to be new cartridges or do something similar to what they did with the 38 Special/357 Mag to prevent the high pressure load being used in a firearm not designed to handle it.

This is a real concern.

I'm sure there will be companies building a press to handle it. If they are to much trouble/have issues i'd build my own.

Looking forward to seeing your results! Which rifle did you go with?

My FFL hasn't called me back to tell me what they were going to get access to, but I'm on the list for orders.

If I was welling to bet one of Horizons

Good things mines bolt 16” 223 with 77TMK @ 2800+ would make me happy

Since there is still debate about reloading I did not “buy” one…. The one I have and I get to play with is a friends new never fired Fierce Carbon Rival FP. Plan is to shoot a few boxes of ammo thru it and build a Ballistic profile he can use.

Bobo knows if I would have bought one it would have been a Horizon. I did buy a Horizon last week but not a 7mm Backcountry….. it’s the caliber Hornady announced they are standardizing and have started shipping brass for ( got 12 bags today) and will be the new kool-aid until another new whiz-bang comes along. 😋
I bought of course the “Venatic” Carbon since it’s sorta named for me. My screen name on all other forums except here is Venatic and most folks know me from Predator Masters as I was a Moderator there for years.
Anywhoooo I now have a new 25 Creedmoor and have been trying to find the ideal powder for both speed and accuracy.
I started out using Alpha SR brass and it’s good stuff but I wanted to do some work with the Hornady brass and large rifle primers.

Another side note my local Ace Hardware has sold 6 Horizons in 7Mm Backcountry even with the fact there is no ammo. Store manager says ammo from two suppliers supposed to arrive any day.

Loaded a few 7mm Backcountry just now…. Want to go shoot’em but have to go to my granddaughter’s birthday party.


Gonna be interesting for sure.