Federal New Cartridge

[KenLee]

How many weeks before Hornady starts pimping out steel cased high pressure 6.5 needmoor? All the cool kids will want some.

I'd need some new hacksaw blades for a few Creed barrels Gotta slow em back down.

 

[Dos XX]

This is a tuner test. Same load and rifle
The only thing changed between targets is moving the tuner one notch.

What is happening to the barrel when the tuner gets moved?

This is not my test.

 

[z987k]

This is a tuner test. Same load and rifle
The only thing changed between targets is moving the tuner one notch.

What is happening to the barrel when the tuner gets moved?

This is not my test.

View attachment 821586

That for sure is waaaay to small of group size to tell anything.

 

[solarshooter]

That for sure is waaaay to small of group size to tell anything.

Also disagrees with other very thorough studies on this subject.

 

[Dos XX]

I am talking about the poi more than group size.

 

[BBob]

That for sure is waaaay to small of group size to tell anything.

Also disagrees with other very thorough studies on this subject.

With a short range BR rifle the sine wave that follows the change in the tuner setting is repeatable every time. I think the point Dos XX was trying to make is there is something going on with barrel harmonics.

 

[jselsor85]

Federal posted a clip on X saying a new cartridge is coming that will be offered in 80 different gun models. Announcement on Jan 7. Any ideas?

It’s the new 7mm Backcountry

 

[Dos XX]

Yes I am

With a short range BR rifle the sine wave that follows the change in the tuner setting is repeatable every time. I think the point Dos XX was trying to make is there is something going on with barrel harmonics.

Yes. The barrel harmonic change is making the bullet poi change without changing the load / velocity.

 

[BBob]

With a short range BR rifle the sine wave that follows the change in the tuner setting is repeatable every time. I think the point Dos XX was trying to make is there is something going on with barrel harmonics.

Yes. The barrel harmonic change is making the bullet poi change without changing the load / velocity.

I’ll add that the group sizes also seem to repeatedly follow the change in tuner settings.

 

[Sundodger]

That's the best sounding theory so far I think. I'll have to go find it and see what they're saying.

That would only decrease the dispersion if the wider muzzle velocity range is linked to the wider bullet drag range somehow, which I guess could be possible. Otherwise if they are not linked, then it should increase dispersion.


In engineering we call this the virtual condition.

 

[PsRpOiGrRiAtM]

It’s the new 7mm Backcountry

 

[Bluefish]

That would only decrease the dispersion if the wider muzzle velocity range is linked to the wider bullet drag range somehow, which I guess could be possible. Otherwise if they are not linked, then it should increase dispersion.


In engineering we call this the virtual condition.

Agree. Just threw it out there as a possible reason for people observing that the variability in speed is not showing up on target. Unfortunately researching it needs a Doppler radar, so any research would be limited to the manufacturers. It would be interesting to see if a BC SD and ES can be calculated.

In a perfect system, speed variation is low, bullet drag variation is low, dispersion from the rifle is low.

 

[Oddfellow]

It’s the new 7mm Backcountry

Is that what this post is still about 18 pages later?

 

[BBob]

It’s the new 7mm Backcountry

Is that what this post is still about 18 pages later?

 

[Mr. October]

Wow. The cartridge isn’t even out yet and it’s getting blasted here.

My favorite thing about the gun community. Everyone screams for innovation but when companies innovate the idea gets poo-poohed before it even hits the market.

 

[wind gypsy]

My favorite thing about the gun community. Everyone screams for innovation but when companies innovate the idea gets poo-poohed before it even hits the market.

Yeah, its an odd phenomenon. Whining every year about how nothing new or unique ever gets introduced around shot show timing but shitting on anything unique that does get released.

 

[solarshooter]

I for one support the innovative move. I have some questions about some of the marketing claims but I'm eager to see how they bear out in testing. Positive response from me!

 

[wnelson14]

My favorite thing about the gun community. Everyone screams for innovation but when companies innovate the idea gets poo-poohed before it even hits the market.

I think the Poo-Poohing comes with the marketing and shilling of the product from “influencers” more than the innovation or product itself.

 

[gretch6364]

Here is what I am really curious about….we know the 7BC isn’t the end of the line. There is going to be a 300BC and one would have to think a 6.5BC.

The question is…what would the parent cases be? Will the 300BC require a magnum bolt head?

I am thinking they will use an unbelted version of the 300 win mag, shortened a little to be able to use longer bullets and it will require a magnum bolt head. But that is a random guess.

 

[BelowAverageBowhunter]

Here is what I am really curious about….we know the 7BC isn’t the end of the line. There is going to be a 300BC and one would have to think a 6.5BC.

The question is…what would the parent cases be? Will the 300BC require a magnum bolt head?

I am thinking they will use an unbelted version of the 300 win mag, shortened a little to be able to use longer bullets and it will require a magnum bolt head. But that is a random guess.

I don't think they'll do a magnum bolt head because with the added pressure it will ad a ton of bolt thrust for the current actions to handle. The reason they can get away with the added pressure on the same actions now is because they aren't getting any heavier bolt thrust at 80,000psi on a standard bolt face than 65,000psi on a magnum bolt face.

I think an 80,000psi magnum bolt face would require a redesigned action or a lot of testing and deciding which of the available actions are strong enough.