What do you think of a modern 375 Win? Using the 6.8 SPC cases (Same casehead as the 375 Win) Call it the 375 SPC?
So if you expand the 6.8 SPC to 375 you eliminate the shoulder and have a modern preasure similar performance version of the 375 win.

The 375 win/38-55 bullets will be perfect functional impact velocities fot the 375 SPC

Good for law enforcement/hunting to 200 yards and the goal would be to get 200 grain bullets @ 2,200 fps and 2150 fpe like the 375 Win.

The 6.8 SPC cases are 1.686" long and with the 375 win bullets will be ideal OAL for micro actions and the AR15 platform.

The casehead is .421 so would allow about 20 thou case taper like the original 6.8 SPC

Here is the 6.8 SPC. The shoulder is .401" and with the 375 bullet be about .405" and keep the same OAL as the 6.8 SPC shooting 200 to 250 grain bullets and if you want to get subsonic shoot 300 grain solids or softs.

quote:

(Same casehead as the 375 Win)

Are you sure?




Anyway, it would seem to make a nice cartridge for a lightweight carbine with enough 'oomph' to get the job done! Mmmm....

Actually, it might be easier to make the cases by turning off the rim from 375 Win cases and shortening them. Just a thought!

A thou diff in casehead is not much...
Can someone measure actual casehead of brass and say who made the brass??
Thanks in advance!

NO, but .100" is Boomie!! We got to get you some new reading glasses son...

Look at the 25/30/32 Remington, it is the rimless version of the 30-30-38-55/375Win by Remington circa 1908 to shoot in their first autoloaders.

Gramps

303 Guy: you could do it that way as well, just a bit more work...

On second thought: the 7.62x39 is the same "basic" case, why not just use it? The 7.62 bolt face is already there, and the brass is pretty cheap. Just neck it up and go happy!!

Rich

The 7.62x39 case is .443" casehead and 1.524" long. pretty much the parent case for the 6.5 Grendel and the 358 Gremlin

It would have enough to make a shoulder to headspace off of for a 375 and could fit regular 375 rifle bullets.

The 6.8 SPC is a .421" vs the 443" of the 7.62

Regardless of the one thou diff between spec caseheads of the 375 Win and SPC the idea is to use short 375 win bullets on the longer SPC case NOT the PPC case that is .441 SPC and PPC is kinda similar in name but the idea is to use the same dimensions of the SPC with a 375 neck/throater and simply neck up the SPC to form cases. The 375 260 grain accubond and partition bullet could prove to be quite versatile with its high bc and expansion qualities down to 1600 fps functional impact velocity in this cart.

The 375 SPC idea can be made from the 25 and 30 Rem cases too. Same taper but longer.

quote:

Originally posted by Idaho Sharpshooter:
On second thought: the 7.62x39 is the same "basic" case, why not just use it? The 7.62 bolt face is already there, and the brass is pretty cheap. Just neck it up and go happy!!

Rich

The same could be done with the 7.62x39 and leave the same taper for a shoulderless case but with that case an improved version with a shoulder to increase case capacity makes sense to me. The russians have the 9x39 that they used on the Chechens that is a heavy solid high BC subsonic round.

Here is the ideal platform IMHO

6.8 SPC Ruger Mini 14



http://www.ableammo.com/catalo...p?products_id=102356

rugger got one thing right on their 3/4-scale M1A copy. Assault rifles are considered "spray & pray". That is the accuracy level every one I have shot displayed.

The AR-platform can provide 1/4moa accuracy out to the 600yd range. A 9,5x39Imp should be at least 1/2moa if built right.

Take the paved road on this drive Boomie...

Rich

quote:

A thou diff in casehead is not much...

OK, now I understand what you meant by "(Same casehead as the 375 Win)".

The way I see it is that such a cartridge would suite a very light and small action which on ocation I wish I had - like when it's pee'ing down with rain and I have to keep my rifle under my poncho! One can't see far anyway. And the lighter the better.

Yes... the cart would be ideal for a light rifle and be under 20 lbs of recoil. The larger bore and small case would be ideal for a short barrel say 18" too.

20 round clip of 220 grains @ 2,200 fps would be a repeat thumper par excelence.

OK so here we have a poor photoshop vision of what it would look like...
223, 6.8 SPC and the 375 SPC

Boom Stick,

I have some 6.8 SPC 1.7" basic brass that would eliminate most forming. Let me know if you want some. 38-55 dies might work as is. I'll have to try it.

That would be awesome if you could make a dummy...
Let me know.
I'd be happy to have a few pieces if you can spare it