6mm BRDX chamber cutting

[Phil]

Neck up and set up a false shoulder on the BRDX

Yup....

What case are you using to fire form the 6 BRDX :

6BR parent brass...

Obviously : Can you then explain what you are necking up?

[/quote]

The neck,obviously, same as setting a false shoulder on any other case.........

 

[bobcat93]

Drags & dkhunt thank you for the input..that is just what I wanted to know..I will only be using one gun due to finical constraints.. As for the ppc ..I just dont think its good past 200 yards..when I have a couple 223 already.
I will go with the #17 -28" kreiger barrel, 8 twist , 40° crown, tight neck chamber in 6BR. I see kreiger offers 2 diameters .2360 & .2370.. I assume I want the .2370 for 105's vld bullets..did I miss anything?

 

[DJ111]

The brdx case blows the shoulder forward just as far as a brx and only .029 short of the dasher. It is no easier to form than a brx or dasher.

You will be served well with the 28" #17 Krieger.

.236 or .237 is up in the air on who you ask. My last hg barrel is a .237 and it works well, but Brux are all .236 and they work good also.

You will be just fine with a .237 for the 105's

Are you sure you want to be turning necks? I use .268 but I see a lot of guys using no turn necks and doing very well with them.

 

[Phil]

The brdx case blows the shoulder forward just as far as a brx and only .029 short of the dasher.

DJ......Wrong man,sorry.

The neck shoulder junction on the BRDX is moved forward .039 it doesn't shorten the neck nearly as much as the BRX.

I believe my 22 BRX reamer moves the neck forward .098, but my memory is fading....

As for the age old debate of false shoulder vs jamb, I believe it is a personal preference, if it works for you GREAT I tried both and use the one that gives ME better results.

YMMV.

Phil.

 

[Phil]

DJ,

Please don`t take my post above as a bashing.....

That is not my intent....

Phil.

 

[DJ111]

Phil,
Sorry man but you need to read the prints. The neck shoulder junction does not change much but the base to shoulder does because you go to a 40 degree shoulder.

Base to shoulder;
6br. 1.071
6brdx 1.1647
6brx 1.171
6 dasher 1.1973

Thanks,
Dallas

 

[Phil]

Dallas,

We are obviously talking about two different measurements here....

You are referring to the base to 40* shoulder measurement, I am referring to how far up the neck the shoulder goes before it starts to form the 40* shoulder.

If that makes any sense.

In other words I`m speaking of the first bend in the neck, that begins to form the top of the shoulder, it is what moves forward(up) the neck .039 on the BRDX.

As far as the second shoulder bend, the one that starts the body, it does move up drastically to form the 40* shoulder that we all love so much.

Phil.

 

[Phil]

Bobcat 93,

I`m sorry for gumming up your thread.........

The BRDX is AWESOME........but so is the 6BR!!!!!

To 300 yards either will be FUN.

I turn all my necks,but this too is a personal preference...

.236/.237....MANY have said that they see no difference, I haven`t personally noticed one either.

A #17 finished at 28" in an 8 twist will work great with just about any bullets you want to try.

Get a reamer for your combo. and have at it.

Phil.

 

[Phil]

Dallas,

What are you getting for an OAL on your BRDX cases????

Phil.

 

[DJ111]

Phil,
No problem. I have been talking about the shoulder the whole time. I did not have much luck with the brdx and found my brx to be easier to form. The brdx has a longer neck than the dasher so you could order it with a slightly shorter free bore than a dasher and have more flexibility with different bullets. If one is not going to take advantage of this there is no point not to go with a dasher then.

My brdx cases would be around 1.542 on the first firing. I did not have much luck with the brdx and abandend the project last summer. I have had better luck with the brx but if I was starting from scratch again I would just go with a dasher.

At 300 yards the 6br is the way to go in my opinion.

Bobcat good luck with your project, you will like it!

 

[bobcat93]

I would assume the BR will serve me well at 300yrd...I love the looks of the BRDX..and am curious to its performance at 300yrd. ? From the info I've read the BRDX seems most at home around the 500yrd. mark. I would think once it slows down a bit and stabilizes its most accurate.. Thus I think that is what the standard 6mm BR is at home around 300yrds..any input?

 

[Erik Cortina]

I would assume the BR will serve me well at 300yrd...I love the looks of the BRDX..and am curious to its performance at 300yrd. ? From the info I've read the BRDX seems most at home around the 500yrd. mark. I would think once it slows down a bit and stabilizes its most accurate.. Thus I think that is what the standard 6mm BR is at home around 300yrds..any input?

If it doesn't shoot at 300 yards, forget 500.

Bullets do not need to slow down to be accurate. The advantage is less wind drift with bigger cartridges.

 

[bobcat93]

Another question when ordering a barrel for the 6mm BR or the BRDX krieger give an option of # of groove.. The options are 4, 5R, or 6 grooves..what should I order ??? The 4 grove??

 

[Phil]

I have 4 groove and 5R again I can`t tell the difference,BUT both are different freebores and twists, so they don`t shoot the same weight bullets....

At 300 yards I don`t believe there to be much of a difference...

 

[Killshot]

Bobcat,
I've had all three grooves you mentioned. I'd say they shot equally (Dasher) but the 5R cleaned up the easiest and lasted the longest with the 4 groove close behind.

I'd also recommend a .236 bore, both of which outperformed the .237 with 105 Berger Hybrids.

My advice is get a no-turn .2704 neck 6BR and have at it.

I shoot F-Class 300 to 1K.

Bob Ariana

 

[bobcat93]

Well I ordered two barrels from krieger. 6mm 29" which should finish out to 28" .237 groove #17 contour. I plan on using a kelbly atlas action with the elesio R5 magazine feed chase, night force nxs npr2 scope jewel 4oz. Trigger.
Chamber 6BR.
Not sure about free bore with the magazine ..any ideas?
Krieger said with there current lead time I should receive my barrels about January 2015..lol..that's ok ..I'm in no hurry as this will give me time to pay off all my components.. I dont believe in credit cards..I'm in the middle of my recent build .its a 223 rem improved with the PTG mag feed system..I assume my wife will have calmed down by the time the 6BR is complete.. Lol

 

[Phil]

Ask Gary what COAL he loads the 6BR to with the magazine, he will probably also be able to tell you what freebore to use.

Phil.

 

[bobcat93]

Good idea on the free bore with magazine info..I've learned from past experience that 99% of the manufacturer in the shooting industry are more then willing to chat and share vast experience and info about there products and what works best..
On another note does the 6BR perform best when just kissing the lands or does it like to get a running start. I still on the fence about a tight neck chamber. I like to control the neck fit to the chamber.

 

[Phil]

Every rifle is different with what it likes,you just have to experiment, the 6BR is easy to make shoot...

As for turning...here again is a personal preference thing....

I turn so I can have control over one more thing...some swear against it,but to me it is just another variable that is controllable,so I take advantage of it and turn all my stuff...

The neck turning is easy it is just the additional investment in the tools required to turn...


Phil.