The 6.8x43 or 6.8mm Remington Spl?

[FAsmus]

Gentlemen;

I know that this is the new offer for the gas-gun tribe but I'm interested to ask; has this been out there long enough for things to start happening with, say, a bolt rifle becoming available and fired with cast bullets?

Good morning,
Forrest

[Harter66]

Actually FAS Goodsteel and I are working 1 up....... sort of.

We......he cut a 6.8 SPC II chamber in a 7mm bbl I requested to have attached to a (oxymoron) pretty Carcano action. The thing here is that it was supposed to be a 7-30 Waters neck and lead w/6.8 Remington chamber the SPC II reamer has a larger neck than its cousin the Waters. That part of it is done just waiting on some other parts and tooling. The long/short is that I will be working w/this very soon.

I currently have a 285-130 Lee for PB and GC and a 27-130 FN to paper patch. I want also if I should happen in to a mould 150 up through 175gr mostly just to do it. I've found 6.8 data to be in short supply so I'm working "blind"sort of w/the 130s PP'd. H335 looks like it will be the place to start. I've always used IMR powders so I will look to 4895 4198 maybe 4350 to work with. I'm looking forward to getting started w/it. I'll have to ream or turn necks a little its only .007. I intend to work w/ 6.8 Remington weights and data to start with. 30-30 cast data should get me started w/lots of good sense,caution, and past learning applied to the data for the next heavier load.


Tim has put a huge amount of work into fitting the new bbl to very tight tolerances. I hope my wood work will do justice to his metal work.

[FAsmus]

Harter66;

Thanks for the post.

Your efforts at making up a 6.8 of your own are good stuff ~ Still, I wonder if there is any sign of a commercial run (besides gas guns) of some kind in this caliber.

It doesn't seem like too great a challenge to dream up a suitable load. After all, we're only talking about the 30 Remington necked down to 270. ~ I bet we could figure something out, given a good basic bolt rifle to work with.

Good evening,
Forrest

[7br]

Thompson Center is making carbine barrels for the contender in this. Should make a tidy 5 lb package throwing a 115gr bullet about 2700 fps. Nothing to sneeze at. Over on the IHMSA websight, someone has an XP100 rebarreled in it. I am thinking the CZ527 would be a great candidate.

[Moonie]

Gentlemen;

I know that this is the new offer for the gas-gun tribe but I'm interested to ask; has this been out there long enough for things to start happening with, say, a bolt rifle becoming available and fired with cast bullets?

Good morning,
Forrest

Not exactly new, I've had one for a couple of years, in the AR platform. I have heard of bolt guns being produced awhile back but the current flavor in favor is 300 AAC Blackout (I have one of those too). I shoot cast in my AR 6.8 SPC Spec II, it shoots them well.

[FAsmus]

7BR;

Roger the CZ. I have one in 7.62x39 and it is very fine. ~ I only wish there was some way to put a good set of receiver sights and globe front on it..

Good evening,
Forrest

[FAsmus]

Moonie;

Thanks for the post.

Help me out here - what is a 300 AAC Blackout?

Forrest

[Harter66]

As a casual point of interest I also worked w a 32 Remington. Its suggested the the 25,30,32 Remingtons are are for all intents rimless 30-30 , 32 spcl. Not so much really actually they're more like mild AIs w/Weatherby shoulders. The 6.8 is a full blown AI w/the neck shortened , shoulder tweaked, and in commercial loadings running up to 60kpsi . Plus the Remington's have a SAMMI neck dia of .306 while the SPCII is .3085 and the x43 has even more changes. While I think it is evolving at this point it has as much in common w/its parent cartridge as the 7-08 has w/the 7x57 and to similar scale.

I've spent a lot of reading time w/this since Tim called and said " little problem. The 7mm reamer just bottomed on the shoulder. It looks like the 6/8 neck is bigger than the 7/30."

[MBTcustom]

300 AAC Blackout is a 5.56/.223 shortened, and necked up to 30 caliber. It was designed to allow a 30 caliber bullet to be fed and fired from the AR platform using standard 5.56 cases as a base and using standard AR platform including the magazine, with only a barrel swap to make it happen.
It seems like an ideal cast boolit round, because the original intent was for it to be used with a suppressor. Therefore, lots of data is available for launching long, heavy projectiles in the "teens" X 1000 FPS range.

[FAsmus]

Harter66;

Roger all that ~ but the question remains: Is there a bolt gun in the works for the cartridge?

FAsmus

[jameslovesjammie]

Lots of 6.8 load data at www.68forums.com .

Remington made the standard 700 in 6.8 with a 1-10 twist and 24" barrel, then killed it like a year later. A model 7 with about a 18" tube would have made much more sense, but Remington's logic since about 2000 has baffled me anyway.

I agree that a CZ mini mauser with a detachable magazine in 6.8 would be just about ideal.

I don't think anyone chambers the standard 6.8 SPC anymore. Most all manufacturers use the 6.8 SPC II chamber. The 6.8x43 is also known as the 6.8 ARP chamber, made by AR15Performance.com. The case dimensions are the same between all of them, but the chamber is different between the three. The SPC II and ARP chamber will give an honest 200 fps more velocity than the standard 6.8.

[FAsmus]

Goodsteel;

Thanks for the post about the 300 AAC Blackout.

I've always liked the idea of a 30 caliber round of the capacity we're discussing - which is why I'm interested in the 6.8 mm Special.

I once chambered a M70 to a modified 30 Herrett with a standard 30/30 neck length. It has worked well for lots of cast bullet shooting.

The 270 diameter would be tougher to feed being as how molds in that size offer nowhere near the choices 30 caliber does ~ but still, the 270 has its own appeal.

Good morning,
Forrest

[BAGTIC]

Basically the Blackout is a .300 Whisper with the name changed to get around copyright laws. It is essentially a .221 Remington necked up to .308.