Federal releases a new cartridge: 7mm Backcountry

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80,000 psi (like the new military cartridge) and you’ll see 3000 fps with 170 gr bullets out of a 20” barrel.

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I am interested in seeing how long those barrels last. Probably wouldn't normally be a problem because I am sure it would be costly to put that many rounds through it, but since they are saying its reloadable that will greatly reduce the cost.

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you’ll see 3000 fps with 170 gr bullets out of a 20” barrel.

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What will be really impressive is if there will be ammo on the shelf for it in 3-5yrs!!

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That’s why I mentioned the rifle mfgs they got on board with, as that’s typically what dooms these new cartridges. Hornady has had a lot more success getting their creedmoorizing of everything to stick because of the simple fact that they don’t sell guns, and therefore aren’t competing with the mfgs. This is what’s currently killing the 6.8 western, which is good enough to be doing much better, but no one will make a gun for it besides browning and Winchester.

Yeah understood, I guess I’m just extremely skeptical of all these “new” cartridges based on how some of the more recent ones have flopped.
The entire WSM line is extinct except for 300wsm, 6.8 spc was gonna rule the AR-15 world and I bought one and can barely find ammo for it and only one kind off the shelf. List goes on and on.
Most buyers of factory rifles/ammo only need those specs for a D!ck measuring contest.
And if a person wants to play around with wildcats then I would imagine there are several tbat already do what they are doing.

Found this off of the Sherman website
28 Sherman Magnum

The 28 SM is fast becoming the king of the flat shooting, hard hitting 28's with cartridges in the Sub 100 grain class like the Nosler, Weatherby, etc.
At 96 grain capacity, the Sherman will reach 3200fps with a 190 class bullet and 3300 with a 180. This makes it a great choice for a flat shooting, wind bucking, hard hitting long range hunting round or ELR matches. WITH ADG head stamped brass, it's a combo that can't be beat.

Sub 100 grain case capacity

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Lol. Mawr hot, fast carteridges to blow boolits through 120 lbs. white tails at 80 yards with no expansion.

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Yeah the Wright Brothers and Henry Ford really figured it all out the first time, humanity should have stopped with the innovation there....

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am interested in seeing how long those barrels last. Probably wouldn't normally be a problem because I am sure it would be costly to put that many rounds through it, but since they are saying its reloadable that will greatly reduce the cost.

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Would probably be similar to any other rifle pushing 3000?

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Would probably be similar to any other rifle pushing 3000?

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I’m not as worried about the speed. It’s the pressure/heat. A 7mm Mag is max around 60,000psi and this can be up to 80,000 psi. That’s a 33% potential increase in pressure. Pressure and heat can quickly wear barrels.

I’m sure that they have tested it and have determined an acceptable amount of rounds that can be fired, but that’s not something they would likely release until you have people with guns in hand and have real world experience with it.

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Overall there’s not much need for another 7mm cannon but the use of a steel case that can be reloaded is interesting.

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For hunters with long-action magnums like 7RM, probably no reason to go to 7PRC or this new 7mm. Think the main point of these new hot-rodded cartridges is to appeal to newer or soon-to-be hunters and long range shooters that want to have 7RM performance in shorter barrels so they can run suppressors and not have a have a 30+ barreled rifle to haul. Same goes for 6.5 PRC vs 6.5 Creed, can get 6.5 Creed terminal performance out of 4 - 6" less barrel which is about right for a can.


As for the steel case and running 80ksi of pressure, that's going to be loud and unpleasant to shoot without a can and I imagine it will take pretty expensive die set to reload and even reloadable, how many times? Overall it's nice to see some innovation.

ETA: Looking at a very recent patent for Federal relating to this ammo, looks like they are relying or will be relying on some very particular designs regarding primer retention and the flash hole to prevent blowout. (Patent #12,135,198 B2).

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As for the steel case and running 80ksi of pressure, that's going to be loud and unpleasant to shoot without a can and I imagine it will take pretty expensive die set to reload and even reloadable, how many times? Overall it's nice to see some innovation.

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Pressure and steel on steel, no give between the components..... would love to see the answer on this from them.

Next thing that could doom it will be reloaders, Clames hit it dead on the head with the reloading dies. They gonna have to be super built to handle reforming steel, and will the case expand enough to get true shoulder headspace? How will reloaders bump shoulders on the them, even if they can figure out their headspace from fire forming? Also can you trim steel with standard trimmers we already have, and will our chamfer tools clean the rims?

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Lol. Mawr hot, fast carteridges to blow boolits through 120 lbs. white tails at 80 yards with no expansion.

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This is being marketed as an elk cartridge, specifically one that will get 7RM performance out of a short, suppressed barrel. They aren’t going to stop making new stuff, this is what they’re in business for. At least they didn’t just give some random legacy cartridge the creedmoor makeover and call it revolutionary, this is adding actual horsepower. Pressure limits have always been the reason it was true to say “x cartridge isn’t doing anything that y isn’t already”, well this one is finally doing something new. If this case design catches on it will be significant.