Blue Box Lapua necks........

[Geronimo Jim]

I have a new 6 BR coming with a 270 neck. What is the thickness of the new Lapua brass? Thanks Jim

 

[KevinThomas]

Jim,

Based on a few samples here on my desk, they run about .0130" on average, or about .269" for a loaded round. Pretty close, so you'll definately want to check these once you load the first ones and make sure you've got some clearance.

Hope that helps.

 

[jonbearman]

You will probably have to do a very light neck turn for safetys sake.My reamer is at .2705 which seems to work with virgin brass.You will have to remove about .001 from your necks.

 

[Killshot]

I have Kiff's Dasher reamer with a .2704" neck. Unturned Blue-Box brass filled with a 105Hybrid measures .2685". I use a .266" bushing in the die. A little snug in the chamber but it shoots extremely well.

I'm on my ninth firing of brass, annealing every other time.

 

[johara1]

The lots i have used the neck wall thickness is .012 or less. Some parts of the neck thickness was less than .011...jim

 

[James EPS]

I agree with others, my 3 boxes of blue box all measures different but none larger the 269 loaded most are thinner if anything. So I guess the smart money says measure everything don't rely on what others say measure for yrself better safe than sorry.

 

[Geronimo Jim]

Looks like I may have a no turn neck barrel. Will be sure the check the brass when I get it. The barrel was chambered over a year and a half ago
and I did not have any new brass yet. Thanks for all the info. Jim

 

[jonbearman]

One thing you might do is have the neck measured to be sure it really is .270. I checked mine with a set of hole gages and mic'ed the hole gage and it was .2708 which gives me enough room to remain a no turn neck with the new brass.

 

[Forum Boss]

I have a new 6 BR coming with a 270 neck. What is the thickness of the new Lapua brass?

Some blue box brass we received last week measured 0.268 dead on loaded with Lapua 90gr Scenars. It's a little thicker, closer to 0.2685, with some other bullets. The older brown box brass measured 0.269 dead on with Lapua 90gr Scenars for us.

FWIW, I have a .270 neck on my BRDX and I turn for 0.267 loaded round.

 

[johara1]

What is the neck wall thickness? That is the number you need, not the loaded round, that changes lo to lot and with the bullet maker.........jim