6 BRA neck tension recommendations?

[A.Thomas]

Fairly new to benchrest and 6 BRA. I have a .267 necked chamber, Lapua brass w/necks turned to .010. Anneal every firing w/AMP annealer. Use neolube in the necks and typically see about 19lbs of seating force. Seeing more horizontal with no conditions than I feel I should. Or maybe I’m just not looking at the group’s properly.

Recommendations/advice?

 

[Ccrider]

What distance is the target? What is your loaded round neck size? What size bushing are you using?

 

[A.Thomas]

I should’ve stated that

Target - 600yds
Loaded round neck - .2635 to .2637
Using .262 titanium bushing

 

[JFrank]

I should’ve stated that

Target - 600yds
Loaded round neck - .2635 to .2637
Using .262 titanium bushing

Tell us about load number 6

 

[A.Thomas]

Tell us about load number 6

That is the 30.55gr charge listed at the bottom

 

[Alex Wheeler]

I run .005nt on unannealed, no lube.

 

[A.Thomas]

I run .005nt on unannealed, no lube.

Thanks Alex. I think I’ll try adding more neck tension and see what happens. You are well known for interpreting ladders. What do you see/recommend? If you don’t mind that is

 

[tom]

I would try around a .259 above and below. Sell the amp, and neolube....or that's what I would do anyways.

Here's a ladder at my new 1,051 ysrd spot in a 4 picking up to 5 moa wind this morning. I run a 260 bushing on a 268 neck reamer with .107-8 neckwalls. Loaded rounds are .265 plus a little depending what bullets.


It was a lovely morning for tuning!




Tom

 

[A.Thomas]

I would try around a .259 above and below. Sell the amp, and neolube....or that's what I would do anyways.

Here's a ladder at my new 1,051 ysrd spot in a 4 picking up to 5 moa wind this morning. I run a 260 bushing on a 268 neck reamer with .107-8 neckwalls.

View attachment 1412308
It was a lovely morning for tuning!

View attachment 1412310


Tom

Thanks for the input. I’ll take all the advice and help I can get. Nice looking test by the way

 

[WSnyder]

I run a 260 bushing on a 268 neck reamer with .107-8 neckwalls.

^^^That doesn't seem to add up at all???

 

[tom]

^^^That doesn't seem to add up at all???

Definitely over the "internet limit"

Tom

 

[Jet]

Agree with the neck tension recommendations but would also switch primer to the BR4, 400 or 450.

 

[A.Thomas]

I have a good stash of 450’s. I switched to 205M’s on the advice of a few of the guys here shooting BRA’s

 

[Webster]

Fairly new to benchrest and 6 BRA. I have a .267 necked chamber, Lapua brass w/necks turned to .010. Anneal every firing w/AMP annealer. Use neolube in the necks and typically see about 19lbs of seating force. Seeing more horizontal with no conditions than I feel I should. Or maybe I’m just not looking at the group’s properly.

Recommendations/advice?

I don't shoot distance but I would evaluate at 100 yds. Too many variables at 600 yrds. Especially difficult if your a beginner at BR shooting. Bench set up, rifle quality, wind, personal skills ect. If it shoots small at 100 it should shoot decent groups at 600?

 

[Dave Zander]

I run .005nt on unannealed, no lube.

Wow , I’m maybe .002”. I’ll have to try a bit more.

 

[Kracken McGraw]

I run .005nt on unannealed, no lube.

Do you use any type of lube inside the necks on virgin cases?

 

[taylorw]

From what I’ve experienced, it tends to pick one the majority of the time and will rarely have two, when running from 1-5K tension.
Thought POI from the 1K to the other groups was interesting..
This was from a wheeler .268 chambered BRA and Lapua brass, shot at Hawks Ridge.
Edit 29.7 H4895 (2928FPS)

 

[Dave Zander]

So if I read this right .004” neck tension gave the tightest group? What’s the 20.7 ? MOA come up ?

 

[Kracken McGraw]

From what I’ve experienced, it tends to pick one the majority of the time and will rarely have two, when running from 1-5K tension.
Thought POI from the 1K to the other groups was interesting..
This was from a wheeler .268 chambered BRA and Lapua brass, shot at Hawks Ridge.
View attachment 1412519

If you don’t mind, What neck tension do you use to find your seating depth before you try different neck tensions?

 

[Dave Zander]

I edited my post. It should have been 29.7 H4895. I forgot to add it to the paper so marked it on my phone and just had a moment. Lol

Thanks, gotcha