6br(6mmNormaBR) vs 6mm Rem. Help Newbie!

B

Bigboredave

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I'm trying to figure out the difference between the two. What's the deal with bushing dies, are that much harder to use? I would appreciate any and all help.
Dave
 
Dave,
You will find a fantastic amount of information on www.accurateshooter.com. There are "cartridge guides" that will help you understand the 6mmbr and then you may come across Richard Franklins article on the 6mmRem ackley improved http://www.accurateshooter.com/guns-of-week/gunweek042/ which will help explain the difference between the two.
Neck bushing dies help you control the neck tension on your loaded rounds. they aren't any harder to use, but they do require some understanding of what you are trying to accomplish and what your loaded round neck diameter is prior to use. You will also find a "6mmbr loading for newbies" on the main page under recent articles (top center of the main page).
Hope this helps a little, and good luck with your search.
If you don't have one already, a reloading manual will help you understand the case capacity and velocity differences between the two cartridges as well
Good luck!
Mike

My answer is predicated on the fact that you asked about the 6mmRem...if you were asking about the 6mm norma br vs 6mm Rem BR you should be able to find info on that site as well. I apologize for the assumption if my answer wasn't what you were looking for.
 
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Just a question. You are by chance not referring to the originol 6BR Remington, which was the first Factory incarnation of the 6BR.

I ask this because there is a tremendous difference in case capacity between any 6mmBR and a 6mm, (244),Remington. .......jackie
 
As Jackie says there's a big difference in the cases. The original 6 mm/.244 Rem is basically the .257 Roberts/7x57 case necked down, while the 6 mm BR Rem/Norma (only slightly different case specs between them) are much shorter cases. The difference between the 6 mm BR Rem and the 6 mm BR Norma are slight, but in a tight chamber cut to the Norma specs a Rem case may not fit (tight near the head of the case) while Rem cases will fit in Norma chambers.

A good loading manual will have case drawings of the 6 mm/.244 Rem and 6 mm BR.
 

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Yes, I'm looking at the 6br Norma -vs- the 6br Rem. This is really more about dies then anything.
 
OK, here is the story.

Remington concieved the 6BR, and it's cousin the 7mmBR.

The originol Remington 6BR had a trim to length of about 1.500 inches. Norma decided to start making 6BR cases, and increased the overall length to 1.560, which became the industry standard for the 6BR. This was indeed named the 6BR Norma.

In '90's, Lapua decided to start making a 6BR as well, but for some reason added darned near .002 to the web diameter. To satisfy Norma, they do indeed have 6mmBR Norma on the headstamp. It is no different than cases made by any manufacturer for the 308 will have "308 Winchester" on the headstamp. The added size in the web meant that many Rifles chambered with minimum spec reamers ground to fit the originol Remington and Norma brass would not accept the new Lapua brass.

Since Lapua became the go to brass in 6BR, Gunsmiths started reaming with reamers that did indeed fit the Lapua Case.

You can fire a older Norma, or even a Remington, in a chamber reamed for Lapua with no ill affects. However, as I said, many older Rifles simply will not accept the Lapua Brass.

All of the dies I have, even my 30BR Reddings, are designed to work with Lapua Brass........jackie
 
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Thank you Jackie, this is an issue that everyone you ask has a different answer. I'm trying to get my arms around it so I can purchase the correct dies, I really appreciate your help.
 
Dave, it was a big deal back in the '90's when Lapaua hit the market. There were even tech bulletins put out by supply houses like Sinclair warning shooters that the Lapua was quite a bit larger in the web.

I doubt this is a big issue now, I do not know anybody who shoots a 6BR ,or a 30 BR where the parent case is the 6BR, who uses anything but Lapua........jackie
 
jackie schmidt said:
Dave, it was a big deal back in the '90's when Lapaua hit the market. There were even tech bulletins put out by supply houses like Sinclair warning shooters that the Lapua was quite a bit larger in the web.

I doubt this is a big issue now, I do not know anybody who shoots a 6BR ,or a 30 BR where the parent case is the 6BR, who uses anything but Lapua........jackie
Click to expand...

The web diameter (just above the extractor-groove) of the original Remington [BR] brass runs 0.463-.464" - this is 0.005-.006 smaller then the current LAPUA 6BR brass.
The Rem. brass will work in a LAPUA chamber: in my experience, the Rem. primer pockets open up after relatively few firings (8-10): it does shoot OK. RG
 
WOuld you think

R.G. Robinett said:
The web diameter (just above the extractor-groove) of the original Remington [BR] brass runs 0.463-.464" - this is 0.005-.006 smaller then the current LAPUA 6BR brass.
The Rem. brass will work in a LAPUA chamber: in my experience, the Rem. primer pockets open up after relatively few firings (8-10): it does shoot OK. RG
Click to expand...

The primer pockets loostening is the result of the webb area and head expanding for the larger chamber or just crappy brass?
 
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