7 SWC

[cp255]

Anyone here try the 7 SWC yet? Thoughts?

 

[Mozak]

Following. I am interested too

 

[Ringostar]

What is it? Which case is it based off of?

 

[cp255]

From what I understand the parent case is 6.4x47 Lapua

Sherman Wildcat Cartridges

shermanwildcatcartridges.com

 

[Fuj]

It basically what I have been doing for years but using the .284
Winchester case as the parent because the .308 family of cases
are too anemic in it's boiler room at any chosen length.

 

[SKWERLZ]

2700 is a pretty good speed for 190’s

 

[Fuj]

With a little scrounging.....It looks like it is based of the 6.5x47.

 

[dthomas]

It's hard for me to believe you can get 2700 fps from a 190 out of a 6.5x47 necked up to 7mm without being way over pressure.

 

[CJ6]

Looks like a short version of Simpsons 7 SGLC.

 

[Horsemen61]

Wonder if it will last?

 

[Sandstorm]

I would think ya need a bit more boiler room here....but hey what do i know.?

 

[Fuj]

I've been seeing a trend lately of smaller cases and much larger high
BC bullets. As a wild catter, I promote experimentation but ?? Another
thing I don't see mentioned on this new endeavor is the primer. These
cases look like they are using a small primer ??

I have to stir the pot here a bit.....Cortina Precision was mentioned as
making dies. Did this just tip off what 7mm Eric will be bringing to TD-6 ??

 

[ErikET]

Genuinely curious what the ideal twist rate for 190s they used in the announcement page would be.

Sherman Wildcat Cartridges

shermanwildcatcartridges.com

They don’t seem to have any updated load data on their regular page in the last 6months.

Cool idea probably but I’d love to see more data.

Neat that Alpha makes brass for it.

 

[Razorwynd]

It's hard for me to believe you can get 2700 fps from a 190 out of a 6.5x47 necked up to 7mm without being way over pressure.

I think that is quite a hot load… most are running 2580-2620 fps.

 

[SKWERLZ]

It's hard for me to believe you can get 2700 fps from a 190 out of a 6.5x47 necked up to 7mm without being way over pressure.

Definitely seems spicy.

 

[SKWERLZ]

Genuinely curious what the ideal twist rate for 190s they used in the announcement page would be.

Sherman Wildcat Cartridges

shermanwildcatcartridges.com

They don’t seem to have any updated load data on their regular page in the last 6months.

Cool idea probably but I’d love to see more data.

Neat that Alpha makes brass for it.

At short magnum speeds with the 190 I use a 1-8.
I want to try them and a 183SMK in a 1-9 barrel.

 

[Fuj]

At short magnum speeds with the 190 I use a 1-8.
I want to try them and a 183SMK in a 1-9 barrel.

I shot the 183 SMK's down to 2600 in an 8.5 twist. 30" Brux.
190 A-tips gave me a few oval holes which surprised me. That
aluminum tip is supposed to mimic a shorter bullet. I had to
keep them at 2800 in that 8.5......183's always shot better.

 

[FeMan]

I shot the 183 SMK's down to 2600 in an 8.5 twist. 30" Brux.
190 A-tips gave me a few oval holes which surprised me. That
aluminum tip is supposed to mimic a shorter bullet. I had to
keep them at 2800 in that 8.5......183's always shot better.

Tipped bullets actually mimic heavier bullets. The tip moves the center of pressure (COP) farther out front. Since the tip (plastic or aluminum) is lighter than lead, the center of mass (COM) doesnt move forward as much. The greater the distance between the COP and the COM, the more twist is needed to stabilize a bullet.