6BR Lapua Brass ?

[65BR]

What's up, people prefer brass in cardboard box?

Change packaging? And is there a quality control issue with newer brass?

Thanks.

 

[JRS]

That's the rumor! :

 

[65BR]

Just wondering if I should hang on to the 4-5 boxes, my 'boxed' brass came in, since I sold my last BR. Guess I need to save my money for the next BR

 

[750k2]

I read somewhere in here that they went down to .012 on the nk
from .013.
Due to a few tight chamber psi problems - not just to save $ on
materials

 

[65BR]

Dang, as good as the stuff I had shot, hate to think they fubbed it up.

Any reason why someone like Hornady cannot make 6BR brass?

Like to see something better than RP 6BR and 260 out there, given so so quality.

We need QUALITY, first rate brass by USA mfg. for rounds that have this accuracy potential. I'd buy Winchester or Hornday if mfg. in those rounds.

Thanks for the info/reply.

 

[fdshuster]

65BR: It's not a rumor: the Lapua 6BR brass in the blue plastic box has case neck wall thickness(s) of .012", but the good news is they are very uniform, at least in the lot# I just bought from Powder Valley> Wish they would not have changed the neck walls from my older cardboard boxed 6BR that measure .013", and with which I'm perfectly happy using in my .272" no turn chambers, problem free. Loaded round neck diameters are .269". Now with the new brass they'll be .267", a little too small for my liking. If it turns out to be a problem I'll have to use it for outside neck turning for my .265 chambers, keeping the "old" for the .272's.

 

[65BR]

So, will reamers start chambering .270?

 

[fdshuster]

You can spec a chambering reamer with whatever neck diameter (or any other dimension on the reamer) that you want.

 

[deadlyswift]

Exactly what I had in my mind. As I have been reading and watching this thread. My Broughton 5c barrel was just chamber with my own PT&G reamer .272 neck 1.570 chamber length. Good thing is I have 300 brand new .013 stuff. So even if I only get 10 loadings out of the 300 peaces that's the life of the 6br. I figure I'll get a lot more loadings than 10. Although I will have to spend another $150 bucks for another reamer. It would be worth it to have things fit with .003 clearance and not have to turn necks. Witch is why I went with the 272 to start with. I'm guess .270 neck dia for my next barrel? Anyone else got a neck dia. in mind? As to going from the old .013 to .012. Obvisously with the .013 it worked very well in the 272 neck. So what do other's think would be a good no turn neck with the new .012 wall thickness? Also I have two barrel blanks on order for a dasher or 6brx project so again. I'm wondering about what would be a good no turn neck dia to go with?
Thanks
Mark

 

[tiny68]

I got 7 boxes of the old stuff last spring for my 30BR ventures from Brunos. Only used one box for the 30BR. I will get the new stuff for future 30BR work since I have to turn the necks anyway. All 3 6BRs I have are 0.272 necks. I want to save the brass that fits the 0.272 chamber best. tim

 

[fdshuster]

Mark: I'm still using my original lot of Lapua 6BR brass, keep a count on the box ident label of how many times that box of 20 has been loaded, and I now have several boxes with over 34 loadings on them. Still going strong with no problems. Neck tension is normal, still using a .267" bushing for loaded dia. of .269", primer pockets are tight as new. Have never annealled a case neck. So your 10 loadings have more than 2/3 of their life remaining. No need to buy a whole new reamer if wanting to step down from a .272" to a .270" neck diameter. For approx. $25 the reamer can be reground to the smaller diameter, and if I see the .012" new brass as a problem that's what I intend to do. If they should return to the .013" thick case necks sometime in the future it will be a simple matter to make a very light cleanup cut on the case necks, for the .270" chamber neck.

 

[dreever]

I've always used .269 neck chambers so I could just clean the brass up on one turning. Now I suppose I'll have a no turn neck with the new brass? Then again is this a bad thing? Probably not considering the luck most guys are having with the no turn necks.

If your using a .272 neck right now I can see how you'd be upset. However is that extra .001 per side going to make that much of a difference in brass life or have any effect on accuracy?
I would be interested in hearing from someone who will maybe take five or ten of the new cases and shoot the hell out of them just to see how they fair accuracy wise and life wise compared to the old .013 per side brass in a .272 neck chamber.

I generally retire my 6BR brass after the 25th loading, by then I've encountered the first split neck which tells me it's time. I've ordered some of the new brass from powder valley to see how it works for me in my .269 neck chambers.

Danny

 

[rchouser]

I am new to this 6BR thing, but, this seems like the place to confirm what my caliper is telling me.

I just got in 2 Blue Plastic boxes of Lapua 6BR.

The brass measures .267 loaded with berger 80's. Now this looks like it supports the .267-.243 = .024/2 = .012 This seems to be supported by your new Spec on the Lapua brass.

The brass fired measures .270. If .002 springback would be normal, than this would place my chamber at .272 which seems to be about what a no turn neck should be.

This is a used Savage LRPV 12 twist 6br. Everything else, I will have to learn.

Please confirm my math or point out my error.

Thanks rc

 

[fdshuster]

rc: All sounds normal to me. I'd put your chamber neck diameter closer to .271". My .272" chamber necks, cut with my reamer, (3) all measure .271" after firing, and my .265" chamber necks measure .264". So, I'm getting .001" total springback. Same "difference" holds true for 6ppc and 223 Rem. chamberings with tight necks. The new Lapua should be fine in your rifle, and the good news is that I found it to be very consistant with variations in thickness too small for me to accurately measure with a tubing mic.

 

[RonAKA]

The brass measures .267 loaded with berger 80's. Now this looks like it supports the .267-.243 = .024/2 = .012 This seems to be supported by your new Spec on the Lapua brass.

The brass fired measures .270. If .002 springback would be normal, than this would place my chamber at .272 which seems to be about what a no turn neck should be.

Your fired brass measures about the same as my Savage LRPV, indicating a .271-0.272 neck in the chamber. Your loaded brass at 0.267 will give a clearance of 0.003-4. With the old brass the clearance would be tighter at 0.001-2. With the new brass the ideal no turn neck probably has moved down to 0.270" from 0.272.

 

[rchouser]

My objectives are all within 600 yards, but, .5 moa is always my goal within my ranges. I am hoping these specs will not do great harm to my goal. (I don't think Ostrich Egg shoots will ever catch on).

Thanks to all for your input and help. rc

 

[Frankr]

my question in what is the shoulder wall thickness? i dont care too much about neck thickness because i turn necks. but its been know for some time that the shoulder wall thickess of .013 is optimum for accuracy and case life,start tampering with shoulder wall thickness and you can get tight/stickey cases that have to be full length sized every fireing, that would not be good and could upset the great accuracy and case life. im now worried, did lapua screw us guys in search of the one hole group to satisfy, factory chamber guys in the long range game???

 

[tclaunch]

I just turned 50 pieces of the new 6BR brass to .0115, and there was not a single piece the cutter missed, cleaned up totally. I run these in .269" chambers. Have not weighed them yet, will finish the other 50 tomorrow nite, and further my knowledge with Lapuas new dimensions. I like what I see so far.

 

[holstil]

Is it possible that Lapua went a step farther and is now turning .0005 of the original cases?
Would this thinner neck also help avoid some split cases for the improving process? I'm thinking, thinner walls easier to expand, make it worse or no difference?
Jim

 

[JRS]

There is also the possibility that with the popularity of the no turn .271 and .272 necks, that LAPUA has chosen to lessen the amount of brass in the neck area. Maybe there are more no turn chambers being built than tight chambers. If your reamer is a bit on the tight or loose side, it would give you a safety margin.