6.5 x 47 Lapua Brass

[GermanS1]

Outstanding work in getting that brass and posting the pictures and specs! This is the biggest scoop in the firearms press in a long time, well done!

On the technical side, it looks like a winner to me. Both as a 6.5 and necked down to 6mm. It has tremendous potential for 300 meter shooting and will do great through 600 as a 6.5 and to 1000 as a 6mm. I think everything we wanted in a 6XC is going to be reality with this case.

Now, off to burn out my 6XC barrel while I wait for reamers and dies to become available for this beauty! :thumb:

 

[jb1000br]

German -- what are your thoughts on the 6x47 wildcat

--neck down only as the taper is nearly "Ackley" and 30deg shoulder will still mag feed and provide enough horsepower

OR

--AI it to 40 degrees for brass growth and a bit more capacity?

I am leaning toward the first option to keep it functioning from a mag better than an AI...

JB

 

[Cheechako]

Hey!

What brass?? Where?? Did I miss something?? Help.

Ray

 

[Forum Boss]

Ray,

Go to home page, read the current blog. Here's a pic. Cases arrived in the mail yesterday:

 

[GermanS1]

Jason, I lean very heavilly towards a simple neck-down with no other changes. In fact, I'd be willing to partcipate in the initial order for reamers and dies with the understanding that it is only a neck-down.
My reasoning is not based on feeding as all my rifles are single shot, but upon working as closely as possible with what Lapua designed as I have the utmost respect for them. If you blow it out and sharpen the shoulder, you might gain a few fps at the muzzle, but it will be next to nothing at the target. I'm a believer in pure accuracy and don't chase MV too much within the range available for a given case design. For example, my 6BR is under,well under) 2800 fps but it hammers.

MV is a wasting asset, BC is forever. Sort of like cars and diamonds.
German

 

[Cheechako]

Hey, that is great news. I've been waiting for this for months and when it finally happens I missed it.:,

OK, I'll take 1000 to start. Where do I send the $$ The 600 Yard NBRSA Nationals is only 5 months away.

Ray

 

[Cheechako]

German

I'm with you on this one. There must be something in that clean Arizona air. I was looking forward to this brass because I am tired of pushing shoulders, trimming, turning, fire-forming, and all the other work of making brass. Let's neck it down, load and shoot. We can start looking at changes at our leisure. JMHO

Ray

 

[jb1000br]

German -- i think you are #5 on the list

Im guessing a rental thru the site may be a better option...will have to figure that out

Glad someone is backing my thinking...I'm not crazy after all :thumb:

So keep the same exact dims and trim to, just a .268-.269nk???

a nice mild RWS/BR2 primer to light it up...

JB

 

[GermanS1]

Ditto on your dimensions. I'll buy a reamer and dies but it'll cost us something to have the first set of dies made, that tooling cost is what we can amortize. Maybe from JLC with "our" sizing reamer.

As to primers, that's a huge topic that I don't want to start on this thread, but send me an email.
German

 

[GermanS1]

Wait! From the dimensions supplied, it looks like the necks are 0.0135" thick which would leave a loaded 6mm at 0.2700",and probably more since the neck might thicken a couple tenths on necking down). So a 0.272" neck might be the best bet for general use. Of course, this is a matter easily handled on individual reamer orders and doesn't affect the basic parameters or size/seat die dimensions.
German

 

[Forum Boss]

Guys,

Don't go specing any reamers yet. The very last part of the case,last .020" at the case mouth), swelled significantly,to .294") when I seated a 107gr SMK bullet. The rest of the neck is .291", and that's with bullet seated well down in the neck. A more aggressive inside/outside chamfer might reduce that flare at the mouth, but it's an issue we'll have to deal with for no-turn brass.

 

[Cheechako]

Guys,

Don't go specing any reamers yet.

Mr Moderator Sir,

My thoughts exactly. I would want at least a couple hunnert of those shiney new cases in my hand before I even thought about a reamer or dies.

ray

 

[GermanS1]

I didn't mean to imply I had Dave Kiff on speed dial!
I just had a barrel chambered for 6XC as my "big 6mm" and haven't even picked it up yet so I have a fair amount of shooting to do before I can switch to the new case. It won't be here for a while anyway so that's OK.

When it arrives I suppose we'll all buy some brass and get to work on "The Project".
German

 

[jb1000br]

I didn't mean to imply I had Dave Kiff on speed dial!
I just had a barrel chambered for 6XC as my "big 6mm" and haven't even picked it up yet so I have a fair amount of shooting to do before I can switch to the new case. It won't be here for a while anyway so that's OK.

When it arrives I suppose we'll all buy some brass and get to work on "The Project".
German

LMAO!

Yea we definitely need to mic a FEW to get good numbers.

I want the fattest neck that i can completely clean up the necks with the turner and have 2-3thou total clearance on a loaded round.

I larger neck reamer could be ordered to open the neck for a no turn chamber -- easier to take more out of the neck, then put it back

I plan to try it at Williamsport 1K so I want to turn the necks a bit at this point.

Hopefully the lump in the neck is just a prototype issue

Cant wait to get them in my hands!

JB

 

[Forum Boss]

I think the flare in the neck mouth will be less with a trimmed cases that has had a 6.5mm expander run through it first,I do this with all cases normally), and with a nice, tight seating-die. I just jammed the thing in there to get a photo ASAP before my exterior light was gone.

From what I've seen on 6BR loaded ammo, I'd expect .0015" or so of extra diameter right on the case mouth with no chamfer. An aggressive chamfer could smooth that out I think.

I think for match purposes, when necked-down to 6mm, it wouldn't be a bad idea to do a light turn as Jason suggests.

 

[GermanS1]

Paul, do you have a 6x47SM case to compare with the Lapua 6.5x47? Looking at the pictures of the 6.5L next to the 6BR and of the 6SM next to the 6BR they sure look identical but for the neck size.
Pondering the imponderable...

 

[Forum Boss]

I don't have a 6x47 SM,Ruag). Jason does, I'm going to send him a couple 6.5x47s and some 6XCs.

Looking at the 6XC, it is also very similar dimensionally,just about .030" longer body with with a slightly longer neck.) Shoulder is .451" on both sample cases I have.

Look at the 6x47 SM QuickDESIGN drawing. This is supposed to be CIP spec. Bigger at shoulder,.4563"), and noticeably longer neck. The SM is longer by .014" or so and most of that is neck:

6x47 SM = 1.8504" OAL
6.4x47 Lapua = 1.836" OAL

So I'd say the Lapua is more a slightly shorter 6XC than a SM clone.

6XC

 

[jb1000br]

I already have XC cases, no need to send them

just need a 260 if you find one

JB

 

[GermanS1]

Jason, do you really need a .260? I have both Remington and Lapua .243 necked up. Let me know and I'll send it.
German

 

[jb1000br]

German -- once i get moved i should be able to dig a 260 dummy out of the die box..wherever it is...could be a bit till i find it, but i know i have 'em somewhere

might just use a 243 as a comparison...i think i know where they are...maybe

I'll figure sumpin out

THanks,
JB