6 BRA, low node...

[rabradshaw]

ES and SD look good, That’s a good node your in what’s on the attachment.
How many rounds down the barrel?
What brass are you using? How many firings?
Reamer specs?
What primers?
Tuner, no tuner?
Anneal?
Large temp swings?
What is your jump?
Do you sort, trim and point bullets? At least sort by OAL?
Seating depth all the same?
Seating pressure consistent?
Do you trim brass, and are they all the same?
Neck wall thickness all the same?
Accurate charge weights?
Primer depth all consistent?
A lot of small things matter, all influence accuracy.
I have a routine finally that works well on my 6’s.
Very anal about brass prep, check throat erosion regularly. I have about .009 thou window on my seating depth, in that range or window I’m golden.
All my BRA’s that I have built tune easy, it’s definitely the easy button.
Just stay consistent in all aspects of reloading when you find a routine that works.

@rabradshaw has a gun that was built in my shop, he can testify. He spent many long evenings in my shop..

Long evenings with my head opened and knowledge getting poured in.
I love my Borden 6BRA. Best shooting gun I own.

 

[jghoghunter]

ES and SD look good, That’s a good node your in what’s on the attachment.
How many rounds down the barrel?
What brass are you using? How many firings?
Reamer specs?
What primers?
Tuner, no tuner?
Anneal?
Large temp swings?
What is your jump?
Do you sort, trim and point bullets? At least sort by OAL?
Seating depth all the same?
Seating pressure consistent?
Do you trim brass, and are they all the same?
Neck wall thickness all the same?
Accurate charge weights?
Primer depth all consistent?
A lot of small things matter, all influence accuracy.
I have a routine finally that works well on my 6’s.
Very anal about brass prep, check throat erosion regularly. I have about .009 thou window on my seating depth, in that range or window I’m golden.
All my BRA’s that I have built tune easy, it’s definitely the easy button.
Just stay consistent in all aspects of reloading when you find a routine that works.

@rabradshaw has a gun that was built in my shop, he can testify. He spent many long evenings in my shop..

I believe a phone call could answers all those questions a lot easier than typing. Pm if you like.

 

[ChristianSilver]

I believe a phone call could answers all those questions a lot easier than typing. Pm if you like.

I’ll definitely get with you tomorrow afternoon, long day here at work in New Mexico.

 

[newbieshooter]

8208 pressures out and simply can't compete with H4895 for velocity. But he said low node....

i haven't had any issues with 8208 running VT103s past 3020 fps.
YMMV

 

[a-dog]

i haven't had any issues with 8208 running VT103s past 3020 fps.
YMMV

I have no idea how you run that speed without blowing out primer pockets immediately. I'm on my 3rd barrel in my f class rifle, 30 inch straight taper, and blow primers once I start creeping up past 2900. That's on both Alpha and Lapua brass. If I stay below 2900, I can get 20+ firings per piece of brass.

 

[ChristianSilver]

I have no idea how you run that speed without blowing out primer pockets immediately. I'm on my 3rd barrel in my f class rifle, 30 inch straight taper, and blow primers once I start creeping up past 2900. That's on both Alpha and Lapua brass. If I stay below 2900, I can get 20+ firings per piece of brass.

I have yet to have blown primers w/ Lapua brass, CCI 450’s w/ Berger 105 and 109’s. During load development I’ve reached 3,030fps and started having heavy bolt lift and ejector marks but no blown primers, maybe a little flat..
XBR 8208 will definitely pressure spike very quickly.

 

[urbanrifleman]

Longer freebores make more powder capacity

 

[ChristianSilver]

Longer freebores make more powder capacity

yes sir..

 

[ChristianSilver]

Longer freebores make more powder capacity

And the reason for asking him about reamer specs..

 

[JFrank]

As an observation the BRA nodes seem to repeat in approx 3% increments , the best one for my self is the one that shoots consistently small and repeats point of aim.
With each new barrel I try to explore each of these nodes as the rifle comes into tune and toward each anti node followed by the next node.
Powder selection and powder lot numbers play a big part as one lot with tune at 31.0 gr at 2920-2930 while the next lot 31gr will be 50 fps faster into an anti node.
Change powder and perhaps the best node might be 2880 or 3000, I just don’t know until I test a bit and find out.

Jim

 

[lawebb21]

My bra loves the low node with varget. I know of a few others that run that speed as well.

 

[20PPC]

As it turned out that lower node worked well for me last weekend at the Palmetto 600 match.
I even went home with a couple pieces of wood.