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Started By
Message
re: Federal releases a new cartridge: 7mm Backcountry
Posted on 1/7/25 at 2:56 pm to Sparetime
Posted on 1/7/25 at 2:56 pm to Sparetime
quote:
Next thing that could doom it will be reloaders
If they can make it cheap enough, Id give up reloading in a heartbeat.
I was at a rifle match a long time ago and a guy was testing something almost exactly like this:
I see there is a company out of texas that makes it now. This had to be 10-15 years ago though. Was supposed to be lighter/cheaper/blah blah for the military. He was shooting a 308. Looking back I should have asked him some questions.
0
Posted on 1/7/25 at 3:02 pm to Sparetime
quote:
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?
They’re claiming this is a steel alloy that’s brand new and the answer to most of the above is yes. Whether that’s true or not we’ll see, but if it is then it will be used in other cartridges in short order. Would be cool to get a little extra out of things like 7mm-08 without messing with a new chamber.
Posted on 1/7/25 at 3:17 pm to TheDrunkenTigah
“This round didn’t just fall out of the sky. The 7 BC’s development, which has taken several years, is based on requirements set forth by the Department of Defense. When looking at the battlefield of the future, the DoD realized that many of our potential adversaries are going to be equipped with body armor. And they want our soldiers, Marines, sailors, and airmen to have rifles that can defeat that armor.”
LINK
LINK
Posted on 1/7/25 at 3:31 pm to 257WBY
quote:
“This round didn’t just fall out of the sky. The 7 BC’s development, which has taken several years, is based on requirements set forth by the Department of Defense.
It was only a matter of time until the civilian version of the new DoD round was introduced. In this case it should be around for a long time since it's being developed and adopted for the military.
Posted on 1/7/25 at 3:39 pm to TheDrunkenTigah
20” barrel and that fricker would singe your eyebrows baw.
Posted on 1/7/25 at 3:57 pm to White Bear
Ron Spomer has a video up, 20" rifle ~3030 fps with 170gr in non-production T&E ammo.
LINK
Backfire had it 2900+ in a 16" barrel so definitely meant for short, suppressed rifles so it will probably be a reasonably successful product even if it isn't reloading friendly for a few years yet.
LINK
Backfire had it 2900+ in a 16" barrel so definitely meant for short, suppressed rifles so it will probably be a reasonably successful product even if it isn't reloading friendly for a few years yet.
Posted on 1/7/25 at 3:57 pm to TheDrunkenTigah
Dam- I just got a 7prc! Should have waited
Posted on 1/7/25 at 4:13 pm to IcedOutBart
I don't know, I am looking at 6.5 and 7 PRC rifles right now and I don't think 7BC is in the running for me personally. One thing I think will be a con for this round and others that follow its formula is the wear it's going to have on the leades and throats of the rifle barrels. It's burning less powder than traditional magnums which might cut down and flame cracking and erosion but the biggest component of wear here is the engraving force of the rifling as the bullet is forced into it upon firing. Cartridge operating pressure has a huge impact here, which is why the Army has training and combat ammo for the new infantry rifle and has dialed back M855A1 pressure a little.
Posted on 1/7/25 at 4:22 pm to Clames
What would it do in a 26” barrel?
Posted on 1/7/25 at 4:27 pm to DownSouthJukin
quote:
What is wrong with:
6.5x55
25-06
.270 Win
.280 Rem
7mm-08
30-06
.308 Win
7mm Rem Mag
300 Win Mag
And for grins:
257 Weatherby Mag
7mm Weatherby Mag
300 Weatherby Mag
Given I've boom glopped every deer Ive ever shot with .223 varmint loads.... Why can't people learn to shoot?
Posted on 1/7/25 at 4:28 pm to White Bear
quote:
What would it do in a 26” barrel?
Probably not much because it has to run a faster burning powder. Basically this is designed to get 7RM/7PRC performance from sub-20" barrels, running it with a 26" defeats the purpose.
Posted on 1/7/25 at 5:31 pm to Clames
quote:
One thing I think will be a con for this round and others that follow its formula is the wear it's going to have on the leades and throats of the rifle barrels.
It prettymuch has to have a tradeoff somewhere, but this is significantly less powder than a lot of magnums getting similar numbers. It’s basically a 280 REM case. Obviously it’s a fast burning powder to get that pressure but they’re claiming barrel life (and recoil) will match 7PRC. That math ain’t mathing, and we’ll know quick cause someone is gonna shoot one out just to say it.
Posted on 1/7/25 at 6:48 pm to X123F45
quote:
Given I've boom glopped every deer Ive ever shot with .223 varmint loads.... Why can't people learn to shoot?
Had a buddy call me today after sighting in 4 hunting rifles and say “I finally noticed what you were talking about, shooting more precisely with smaller caliber rifles.” Of the 4, he’s now hunting with his 243.
I’ll have to see the videos, but from reading the pressures and velocities this is running then I’d expect a sub 1k round barrel. I’ll be curious as to what smiths will get the reamer for it being you’ll only be buying factory ammo. Maybe it has a place in a back country hunting round, if so and it actually sticks around then I think the 7mag becomes less prominent. Non-belted between this and a 7PRC, and they both shoot heavier and higher bc bullets. Lighter 7mm bullets can be shot through cartridges like the 7saw and you don’t need magnum primers or bolts to do it.
Posted on 1/7/25 at 7:25 pm to ruger35
quote:
reading the pressures and velocities this is running then I’d expect a sub 1k round barrel
Just watched Spomer and he said Federal is saying they’ve found it to have the same barrel life and recoil as a 280 AI. They contend barrel life and recoil are more related to the powder charge, i.e. the erosive effect of solid unburned powder traveling down the throat and how much of that is left to burn and create a “jet” effect at the muzzle, not pressure. It stands to reason, people who shoot the 280 ackley beam about how it’s able to approximate the 7RM with less powder, because it’s more efficient. If that proves to be true this could be a pretty big innovation.
Posted on 1/7/25 at 7:32 pm to X123F45
quote:
Given I've boom glopped every deer Ive ever shot with .223 varmint loads.... Why can't people learn to shoot?
Again, this isn’t for broad siding whitetail at 80 yards, it’s for dialing on the elk of a lifetime at 540 yards, and not losing any velocity while shaving almost a pound of barrel off the rifle you just carried 17 miles and 4000 feet up. They could be full of shite, but if they’re not this is a big deal.
Posted on 1/7/25 at 7:59 pm to TheDrunkenTigah
quote:
That math ain’t mathing, and we’ll know quick cause someone is gonna shoot one out just to say it.
Part of the recoil claim will happen simply because less powder = less mass ejecta at the muzzle all else being equal. Plus you are pretty much expected to run this with a can. There is definitely a target niche for this round and I expect it will do well (and it seems there are plenty of rifle manufactures looking to chamber it). What will be really interesting to see is how the technology is applied to other caliber. Will 80ksi .308 Winchester be an option? 300 Win Mag? .50 BMG?
Posted on 1/7/25 at 8:14 pm to Clames
That’s why I’m following it more than anything. 130gr 270 win or 6.5PRC at 80K is going to be point and click further than I care to shoot at an animal. At that point you put a solid duplex reticle on top and go kill, no dialing and no subtensions. For the people saying why do we need anything new, Jack O’Connor would sell his left nut to have that capability.
Posted on 1/7/25 at 9:21 pm to TheDrunkenTigah
Bye bye PRC?
I'm sticking with the 7mm rem mag.
I'm sticking with the 7mm rem mag.
Posted on 1/7/25 at 9:28 pm to Clames
quote:
don't know, I am looking at 6.5 and 7 PRC rifles right now
A 270win is better than a 6.5 PRC.
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