7 FCP, a cartridge developed specifically for the F Class Scene...

[Bryan Blake]

Introduction of the 7 FCP.

The 7 FCP is a new cartridge designed specifically for F Class. F class is prone shooting while shooting 10-20 shot strings either pair fire of string fire at distances of 300-1000 yards. the case starts out as a 6.5 PRC.
the 6.5PRC has a case capacity of about 66.5 grains of H20. the 7 FCP has a capacity of 72 grains. to put into perspective the 284 Shehane has a case capacity of about 67 grains and the 284 of about 64 grains. the 7 SAUM has about 72.5 grains. we wanted to develop a 2" approx length case that had a 40 degree shoulder and would hold about the same capacity as a 7 SAUM. 7 SAUM brass has become nearly extinct so it was time to develop a case for f class that could shoot the 180 grain bullets in the 2975 fps area without over pressure.


Shown is the 6.5 PRC already necked up to 7mm for the H2O testing, and also shown is the 7 FCP for the H20 Testing.

 

[Bryan Blake]

Here is some data during testing. We find that this "dasher" length neck is providing excellent SD results so far across multiple powders and bullets and primers.

 

[Bryan Blake]

 

[dthomas]

Is that starting out as 6.5prc brass?

 

[Kurz]

the case starts out as a 6.5 PRC.

That's what the man wrote.

 

[dthomas]

That's what the man wrote.

I missed that when I read his post. Went back and reread it, yes its right there in the beginning.

 

[Sandstorm]

Nice work Brian

 

[Willow]

Looks good. My variant isn't quite as extreme, but does take the shoulder out to 40 degrees and the sidewalls are blown out 8 thou. It won't give me 72gr of capacity, but it should allow me to run comfortably above 284 velocities, hopefully with accuracy just as good, if not better than.

 

[Walt Krafft]

How long will 6.5PRC brass be available?

 

[Willow]

How long will 6.5PRC brass be available?

It just disappeared in Australia...when the next batch will arrive is anyone's guess. I'm hearing 2024 from the local distributor. Hope they're wrong.

 

[Bryan Blake]

 

[Bryan Blake]

 

[Bryan Blake]

This testing was all done at Ben Avery 1000 yard range on two different rifles. See first image for rifle data.

 

[Sandstorm]

I like it...thanks Bryan
I got a reamer inbound....should be fun.

 

[Bryan Blake]

I like it...thanks Bryan
I got a reamer inbound....should be fun.

I have a ton of data on 5 different powders and 3 different bullets out of two different guns. Just getting it all organized currently.

 

[whatwind?]

@Bryan Blake what is neck length?

 

[RustyPin]

Offering the same case capacity after fire forming as the 7-SAUM I am assuming the largest benefit is 6.5-PRC Lapua Brass?

 

[LVLAaron]

A benefit to people necking up 6.5PRC to 7mm is that they can use a regular 6.5 sizing die.

What are the resizer options for this 7FCP?

 

[Sandstorm]

Im sure Bryan is making the die's as well, this being his development.
Hes got good stuff and I got to see the cartridge in action over the weekend shooting with him.

 

[ebb]

But how does it know??