6mm-BRiGT: Another 6-GT Brass Thread. "Six Bright"

[RustyPin]

Wildcat using 6GT Brass. Just dorking around and decided to do a virtual mock up 6GT Brass through a 6mm BR Sizing Die. Has anyone changed the GT to a 30 Degree Shoulder? It might grow more than I've illustrated.[

 

[No manches"]

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[Stan Taylor]

Been there and dun that great cartridge I have won several matches over last few years with it.

 

[rockhound78]

I ran a 6mm br reamer deeper in a current 6mm br barrel so as to be able to use GT brass. and still use 6mm br dies. Worked out pretty well, but was more than I needed for our varmint silhouette matches(we have velocity/caliber limits), so cut off the back of the barrel and rechambered to make a 6mm BRX which was just at the velocity threshhold we have.

 

[RustyPin]

I ran a 6mm br reamer deeper in a current 6mm br barrel so as to be able to use GT brass. and still use 6mm br dies. Worked out pretty well, but was more than I needed for our varmint silhouette matches(we have velocity/caliber limits), so cut off the back of the barrel and rechambered to make a 6mm BRX which was just at the velocity threshhold we have.

That's Cool BEANS! Performance info? Can you send me a piece of formed brass?

 

[RustyPin]

Been there and dun that great cartridge I have won several matches over last few years with it.
View attachment 1298306

Please share what positives and negatives? Maybe a little spec on your barrel and what are your primary distances please? What Pills are it's favorite and speeds?

 

[Stan Taylor]

I get the same velocity that I did in my straight 6 x 47 lapua with less powder and I shot it and 600 and thousand yard benchrest competition .

 

[RustyPin]

I get the same velocity that I did in my straight 6 x 47 lapua with less powder and I shot it and 600 and thousand yard benchrest competition .

Did you change to 4350? How does your charge compare to the Dasher?

 

[Stan Taylor]

Yes I was using 4350 in the regular parent case about 2grains less powder same velocity range as dasher.

 

[urbanrifleman]

So if I use 34.5 grains of AR COMP in a 6xc with a 108 Berger to achieve 2960 with single digit spreads and tiny groups is that the same thing?

 

[rockhound78]

Will see if I still have any brass laying around

 

[Hengehold]

So if I use 34.5 grains of AR COMP in a 6xc with a 108 Berger to achieve 2960 with single digit spreads and tiny groups is that the same thing?

Yikes, 34.5 gr? That means you only have about 75% fill capacity.
What distance do you shoot it at?
Does it shoot well?

 

[urbanrifleman]

Yikes, 34.5 gr? That means you only have about 75% fill capacity.
What distance do you shoot it at?
Does it shoot well?

It shoots very, very well.

I think people think too much.

 

[urbanrifleman]

Yikes, 34.5 gr? That means you only have about 75% fill capacity.
What distance do you shoot it at?
Does it shoot well?

The Schoolbus 6xc Elisio

My first barrel. I contoured it and chambered it. Tubb 6xc chamber. Tubb Break. Nightforce Benchrest. Still waiting on my trigger from Larry Scott. :)

forum.accurateshooter.com

I wanted to see if I could shoot it slower with a faster powder for lower spreads with the small primer.

Totally worked.

I think very little is talked about NOT trying to get maximum velocity.

 

[Hengehold]

It shoots very, very well.

I think people think too much.

Good point. Thinking is over rated.

 

[urbanrifleman]

Good point. Thinking is over rated.

You should hear how many of customers freak out when they shoot a knot hole with the Tubb break in bullets 6 grains under minimum charge.

 

[urbanrifleman]

I think most people are obsessed with that upper node in every cartridge.

People will say I have a 6xc but I want Dasher velocities and barrel life.

I just shoot it slower, so find a powder that peaks sooner. It seems simple enough for me. I was specifically told AR COMP would not work in the 6xc. The people that told me that were wrong.

There were several threads on this forum where other shooters said they loved 8208 in the 6xc... same results. Less powder... medium velocities, small groups.

This guy liked 35.1 and was shooting at 3050. That is pretty much exactly what I was finding. I was just under 3000 at 2980ish at 34.3 to 34.6 where there is really sweet dead spot.

6XC & 8208 load data?

Can't seem to find in loading data for 8208 use in the 6xc. I've had great success with Reloader 17, but I'd like to try something else. BTW - I'm using 115 DTACs.

forum.accurateshooter.com

 

[BoydAllen]

I spot an atypical dimension. Your neck is tapered. I gather that this is a no turn chamber design, and since unturned case neck do taper, tapering the neck means you have more uniform clearance throughout the length of the neck....or was their some other reason?

 

[RustyPin]

I spot an atypical dimension. Your neck is tapered. I gather that this is a no turn chamber design, and since unturned case neck do taper, tapering the neck means you have more uniform clearance throughout the length of the neck....or was their some other reason?

That is the Norma BR Print, I merely added 0.20" to the existing Shoulder. I decided it was best to just use theirs so nobody thought I was copying another Cartridge. As I had made up a few in an attempt to guess how much the brass would grow going from the 35 Degree shoulder to the 30. Works out perfect for GT Brass for Illustration purposes anyway. The Neck would be whatever the GT Brass is I'm guessing only using the Body Die. Thanks for the reply.

 

[NC/Br Shooter]

I reading this forum wondering,(why?)